Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 2, Problem 2.13OQ
A student at the top of a building of height h throws one ball upward with a speed of νi and then throws a second ball downward with the same initial speed νi. Just before it reaches the ground, is the final speed of the ball thrown upward (a) larger, (b) smaller, or (c) the same in magnitude, compared with the final speed of the ball thrown downward?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Sasha stands on the ground and tosses a baseball perfectly vertically up to her friend Helge, who catches it by reaching outside the window of his apartment building. She gives the ball an initial speed of vi= 19.7 m/s, and Helge catches it 1.40 s later when it reaches his hands. If Helge were to drop the baseball from rest at this point, what would be its final speed vf when it reaches Sasha’s hands down below? (She catches the ball at the same height from which she tossed it.)For your limit check, investigate what happens to vf as Sasha’s launch speed gets very large (i.e., as vi→∞).
This is my question. I am also trying to figure out what formulas I would use to solve it.
A 5m tall elevator travels uniformly up an elevator shaft at 8m/s. At some point in time, a bolt falls from the top of the elevator and falls freely down the shaft. You can ignore the effect of air resistance. Assume that the bolt falls from the *wall* of the elevator shaft when it is level with the top of the elevator, and then falls freely without air resistance. How many seconds after the fall will the bolt pass the bottom of the elevator?
A skier starts from rest from a height of 20 m and skis down the slope into a valley and back up a slope of 12 m high with respect to the valley. What speed does the skier have the moment he reaches the height of 12 m?
Chapter 2 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 2 - Are officers in the highway patrol more interested...Ch. 2 - Make a velocitytime graph for the car in Figure...Ch. 2 - If a car is traveling eastward and slowing down,...Ch. 2 - Which one of the following statements is true? (a)...Ch. 2 - In Figure 2.12, match each vxt graph on the top...Ch. 2 - Consider the following choices: (a) increases, (b)...Ch. 2 - One drop of oil falls straight down onto the road...Ch. 2 - A racing car starts from rest at t = 0 and reaches...Ch. 2 - A juggler throws a bowling pin straight up in the...Ch. 2 - When applying the equations of kinematics for an...
Ch. 2 - A cannon shell is fired straight up from the...Ch. 2 - An arrow is shot straight up in the air at an...Ch. 2 - When the pilot reverses the propeller in a boat...Ch. 2 - A rock is thrown downward from the top of a...Ch. 2 - A skateboarder starts from rest and moves down a...Ch. 2 - Oil another planet, a marble is released from rest...Ch. 2 - As an object moves along the .v axis, many...Ch. 2 - A pebble is dropped from rest from the lop of a...Ch. 2 - A student at the top of a building of height h...Ch. 2 - Von drop a ball from a window located on an upper...Ch. 2 - A pebble is released from rest at a certain height...Ch. 2 - A ball is thrown straight up in the air. For which...Ch. 2 - A hard rubber ball, not affected by air resistance...Ch. 2 - Each of the strobe photographs (a), (b). and (c)...Ch. 2 - If the average velocity of an object is zero in...Ch. 2 - Try the following experiment away from traffic:...Ch. 2 - Prob. 2.3CQCh. 2 - Prob. 2.4CQCh. 2 - Prob. 2.5CQCh. 2 - You throw a ball vertically upward so that it...Ch. 2 - (a) Can (he equations of kinematics (Eqs....Ch. 2 - (a) Can the velocity of an object at an instant of...Ch. 2 - Two cars are moving in the same direction in...Ch. 2 - Section 2.1 Position, Velocity, and Speed The...Ch. 2 - The speed of a nerve impulse in the human body is...Ch. 2 - A prison walks first al a constant speed of 5.00...Ch. 2 - A particle moves according to the equation x =...Ch. 2 - The position of a pinewood derby car was observed...Ch. 2 - The position of a particle moving along the x axis...Ch. 2 - A positiontime graph for a particle moving along...Ch. 2 - An athlete leaves one end of a pool of length L at...Ch. 2 - Find the instantaneous velocity of the particle...Ch. 2 - Review. The North American and European plates of...Ch. 2 - A hare and a tortoise compete in a race over a...Ch. 2 - A car travels along a straight line at a constant...Ch. 2 - A person takes a trip, driving with a constant...Ch. 2 - Review. A 50.0-g Super Ball traveling al 25.0 m/s...Ch. 2 - A velocity-time graph for an object moving along...Ch. 2 - A child rolls a marble on a bent track that is 100...Ch. 2 - Figure P2.9 shows a graph of vx versus t for the...Ch. 2 - (a) Use the data in Problem 3 to construct a...Ch. 2 - A particle starts from rest and accelerates as...Ch. 2 - An object moves along the x axis according to the...Ch. 2 - A panicle mows along the x axis according to the...Ch. 2 - Draw motion diagrams for (a) an object moving to...Ch. 2 - Each of the strobe photographs (a), (b), and (c)...Ch. 2 - The minimum distance required to stop a car moving...Ch. 2 - An electron in a cathode-ray tube accelerates...Ch. 2 - A speedboat moving at 30.0 m/s approaches a...Ch. 2 - A parcel of air moving in a straight tube with a...Ch. 2 - A truck covers 40.0 m in 8.50 s while smoothly...Ch. 2 - An object moving with uniform acceleration has a...Ch. 2 - In Example 2.7, we investigated a jet landing on...Ch. 2 - Prob. 2.31PCh. 2 - Solve Example 2.8 by a graphical method. On the...Ch. 2 - A truck on a straight road starts from rest,...Ch. 2 - Why is the following situation impossible?...Ch. 2 - The driver of a car slants on the brakes when he...Ch. 2 - Prob. 2.36PCh. 2 - A speedboat travels in a straight line and...Ch. 2 - A particle moves along the x axis. Its position is...Ch. 2 - A glider of length moves through a stationary...Ch. 2 - A glider of length 12.4 cm moves on an air track...Ch. 2 - An object moves with constant acceleration 4.00...Ch. 2 - At t = 0, one toy car is set rolling on a straight...Ch. 2 - Figure P2.43 represents part of the performance...Ch. 2 - A hockey player is standing on his skates on a...Ch. 2 - In Chapter 9, we will define the center of mass of...Ch. 2 - An attacker at the base of a castle wall 3.65 m...Ch. 2 - Why is the following situation impossible? Emily...Ch. 2 - A baseball is hit so that it travels straight...Ch. 2 - It is possible to shoot an arrow at a speed as...Ch. 2 - The height of a helicopter above the ground is...Ch. 2 - Prob. 2.51PCh. 2 - A ball is thrown upward from the ground with an...Ch. 2 - A student throws a set of keys vertically upward...Ch. 2 - At time t = 0, a student throws a set of keys...Ch. 2 - A daring ranch hand sitting on a tree limb wishes...Ch. 2 - A package is dropped at time t = 0 from a...Ch. 2 - Automotive engineers refer to the time rate of...Ch. 2 - A student drives a moped along a straight road as...Ch. 2 - The speed of a bullet as it travels down the...Ch. 2 - A certain automobile manufacturer claims that its...Ch. 2 - The froghopper Philaenus spumarius is supposedly...Ch. 2 - An object is at x = 0 at t = 0 and moves along the...Ch. 2 - Ail inquisitive physics student and mountain...Ch. 2 - In Figure 2.11b, the area under the velocitytime...Ch. 2 - A ball starts from rest and accelerates at 0.5(H)...Ch. 2 - A woman is reported to have fallen 144 ft from the...Ch. 2 - An elevator moves downward in a tall building at a...Ch. 2 - Why is the following situation impossible? A...Ch. 2 - The Acela is an electric train on the...Ch. 2 - Two objects move with initial velocity 8.00 m/s,...Ch. 2 - At t = 0, one athlete in a race running on a long,...Ch. 2 - A catapult launches a test rocket vertically...Ch. 2 - Kathy tests her new sports car by racing with...Ch. 2 - Two students are on a balcony a distance h above...Ch. 2 - Two objects, A and B, are connected by hinges to a...Ch. 2 - Astronauts on a distant planet toss a rock into...Ch. 2 - A motorist drives along a straight road at a...Ch. 2 - A commuter train travels between two downtown...Ch. 2 - Lisa rushes down onto a subway platform to find...Ch. 2 - A hard rubber ball, released at chest height,...Ch. 2 - A blue car of length 4.52 m is moving north on a...Ch. 2 - Review. As soon as a traffic light turns green, a...Ch. 2 - In a womens 100-m race, accelerating uniformly,...Ch. 2 - Two thin rods are fastened to the inside of a...Ch. 2 - A man drops a rock into a well, (a) The man hears...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- From a clifftop over the ocean 130 m above sea level, an object was shot straight up into the air with an initial vertical speed of 166.6 ms On its way down it missed the cliff and fell into the ocean. Its height (above sea level) as time passes can be modeled by the quadratic function f, where f(t)=−4.9t^2+166.6t+130 Here t represents the number of seconds since the object’s release, and f(t) represents the object’s height (above sea level) in meters. 1) After this, this object reached its maximum height. 2) This object flew before it landed in the ocean. 3) This object was above sea level 24s after its release. 4) This object was 1526.5 m above sea level twice: once after its release, and again later after its release.arrow_forwardA particle starts from the origin at t = 0 with a velocity of 5.4j and moves in the xy plane with a constant acceleration of (4.6i + 1.0j) m/s 2. At the instant the particle's x coordinate is 29 m, what are (a) its y coordinate and (b) its speed? (a) Number Units (b) Number i Unitsarrow_forwardAn attacker at the base of a castle wall 3.75 m high throws a rock straight up with speed 7.50 m/s from a height of 1.60 m above the ground. (a) Will the rock reach the top of the wall? Yes No (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? m/s Enter a number. (c) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.50 m/s and moving between the same two points. m/s (d) Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? Yes No (e) Explain physically why it does or does not agree.arrow_forward
- x = xót vót tật, ở = To +ất, v = vỏ +2āA,t=i + -b+√b²-4ac 2aarrow_forwardHobbyists build a compressed air powered cannon which is able to launch a pumpkin a horizontal distance of 2700 ft. Assuming no air resistance, and assuming the pumpkin is launched at ground level, what is the minimum initial speed of the pumpkin (just as it leaves the cannon) that is needed for it to reach this distance, in m/s? 294 X m/sarrow_forwardAn object is released from rest at an unknown height h above the ground .one second later a second object is released from rest at the same height. When the first object strikes the ground,the second is 20 m above the grounds . What is the initial height h?arrow_forward
- Question 3 of 3: Rocky McBlock is a receiver for the Kennesaw Kilowatts in Metro Metric Football League. In this league all distances on the field are measured in meters, and Rocky always runs straight up and down the field (there is no sideways motion - only motion towards and away from the end zone). Rocky leaves the line of scrimmage when the ball is snapped and runs forward for 18 meters at a speed of 9 seconds. He catches the ball and continues to run forward for 16 more meters in 12 seconds, at which point he reaches the end zone. What is his speed before he catches the ball? What is his speed after he catches the ball? What is his average speed for the whole play from the time he leaves the line of scrimmage until the time he reaches the end zone?arrow_forwardIn the vertical jump, an athlete starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat the athlete as a particle and let ymax be his maximum height above the floor.To explain why he seems to hang in the air, calculate the ratio of the time he is above ymax/2 (moving up from ymax/2 to ymax and then moving down to ymax/2) to the time it takes him to go from the floor to that height. You may ignore air resistance.arrow_forwardIn the vertical jump, an Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 ss in the air (their "hang time"). Treat Kobe as a particle and let ymaxymax be his maximum height above the floor. Note: this isn't the entire story since Kobe can twist and curl up in the air, but then we can no longer treat him as a particle. Hint: Find v0 to reach y_max in terms of g and y_max and recall the velocity at y_max is zero. Then find v1 to reach y_max/2 with the same kinematic equation. The time to reach y_max is obtained from v0=g (t), and the time to reach y_max/2 is given by v1-v0= -g(t1). Now, t1 is the time to reach y_max/2, and the quantity t-t1 is the time to go from y_max/2 to y_max. You want the ratio of (t-t1)/t1 To explain why he seems to hang in the air, calculate the ratio of the time he is above ymax/2ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore…arrow_forward
- A car moving in a straight line starts at xx = 00 at tt = 00 . It passes the point xx = 20.0 mm with a speed of 10.5 m/sm/s at tt = 3.00 ss . It passes the point xx = 380 mm with a speed of 45.0 m/sm/s at tt = 20.0 ss . Find the average velocity between tt = 3.00 ss and tt = 20.0 ss . answer with the appropriate units. Find the average acceleration between tt = 3.00 ss and tt = 20.0 ss . answer with the appropriate units.arrow_forwardAn attacker at the base of a castle wall 3.80 m high throws a rock straight up with speed 8.40 m/s from a height of 1.40 m above the ground. (a) Will the rock reach the top of the wall? Yes, No (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? m/s(c) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 8.40 m/s and moving between the same two points. m/s(d) Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? Yes, No (e) Explain physically why it does or does not agree.arrow_forward(c) The position of a particle (in m) is as followed. 7= 6 î+0.8t² k Find the velocity of the particle and explain why the particle is moving in a rectilinear motion (i.e moving in a straight line). (ii) Find the speed of the particle when t = 1.5 s. (iii) Draw the motion graph of the particle for the first 1.5 seconds.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Kinematics Part 3: Projectile Motion; Author: Professor Dave explains;https://www.youtube.com/watch?v=aY8z2qO44WA;License: Standard YouTube License, CC-BY