Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
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Chapter 11, Problem 6PQ
To determine
The impulse exerted by the floor on each jar and the jar which is more likely to break.
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You want to estimate from how high if it is safe to jump onto a concrete floor. For this, you consider impulse and the force of impact.If you jump from a chair of height of 0.50 m, and land on a concrete floor with stiff legs, it just starts to hurt. Therefore, you consider the average force on your body in such a landing to be your ‘safe limit’. In this case, you estimate that your body moves by about 0.75 cm during the landing. If you allow yourself to bend your knees upon landing on the same concrete floor, you are able to mitigate the force of impact. You estimate that, when bending your knees during landing, your body moves by about a foot, or 0.30 m. For the purpose of this exercise, you consider yourself with a mass of 60 kg. Given the estimates made above, from how high can you safely jump onto a concrete floo
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Describe an example of an impulse. Identify two ways you can change the impulse. For instance, how could you make the impulse greater? Describe both a system that involves one abject and a system that involves two interacting objects.
Chapter 11 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 11.1 - Forensic Science Forensic science is the...Ch. 11.2 - Why does a coach instruct a gymnast to bend her...Ch. 11.3 - When two objects collide, the impulse exerted on...Ch. 11.3 - Prob. 11.4CECh. 11.5 - If a spacecraft is headed for the outer solar...Ch. 11.6 - The cue ball hits the eight-ball in a game of pool...Ch. 11 - When a spacecraft collides with a planet, it is...Ch. 11 - When a person feels that he is about to fall, he...Ch. 11 - A tall man walking at 1.25 m/s accidentally bumps...Ch. 11 - Prob. 4PQ
Ch. 11 - A basketball of mass m = 625 g rolls off the hoops...Ch. 11 - Prob. 6PQCh. 11 - Sven hits a baseball (m = 0.15 kg). He applies an...Ch. 11 - Prob. 8PQCh. 11 - Prob. 9PQCh. 11 - In a laboratory, a cart collides with a wall and...Ch. 11 - Prob. 11PQCh. 11 - A Show that Equation 11.4 (the impulsemomentum...Ch. 11 - A crate of mass M is initially at rest on a level,...Ch. 11 - Prob. 14PQCh. 11 - Two pucks in a laboratory are placed on an air...Ch. 11 - A truck collides with a small, empty parked car....Ch. 11 - Prob. 17PQCh. 11 - Prob. 18PQCh. 11 - A skater of mass m standing on ice throws a stone...Ch. 11 - A skater of mass 45.0 kg standing on ice throws a...Ch. 11 - Prob. 21PQCh. 11 - In a laboratory experiment, 1 a block of mass M is...Ch. 11 - Ezra (m = 25.0 kg) has a tire swing and wants to...Ch. 11 - A suspicious physics student watches a stunt...Ch. 11 - A 2.45-kg ball is shot into a 0.450-kg box that is...Ch. 11 - Prob. 26PQCh. 11 - Prob. 27PQCh. 11 - Prob. 28PQCh. 11 - A dart of mass m is fired at and sticks into a...Ch. 11 - A dart of mass m = 10.0 g is fired at and sticks...Ch. 11 - A bullet of mass m = 8.00 g is fired into and...Ch. 11 - Prob. 32PQCh. 11 - A bullet of mass m is fired into a ballistic...Ch. 11 - Prob. 34PQCh. 11 - One object (m1 = 0.200 kg) is moving to the right...Ch. 11 - Prob. 36PQCh. 11 - Prob. 37PQCh. 11 - Prob. 38PQCh. 11 - Two objects collide head-on (Fig. P11.39). The...Ch. 11 - Initially, ball 1 rests on an incline of height h,...Ch. 11 - Initially, ball 1 rests on an incline of height h,...Ch. 11 - In an attempt to produce exotic new particles, a...Ch. 11 - Pendulum bob 1 has mass m1. It is displaced to...Ch. 11 - Prob. 44PQCh. 11 - Prob. 45PQCh. 11 - Prob. 46PQCh. 11 - Prob. 47PQCh. 11 - Prob. 48PQCh. 11 - Two skateboarders, with masses m1 = 75.0 kg and m2...Ch. 11 - In a laboratory experiment, an electron with a...Ch. 11 - In Figure P11.51, a cue ball is shot toward the...Ch. 11 - A proton with an initial speed of 2.00 108 m/s in...Ch. 11 - A football player of mass 95 kg is running at a...Ch. 11 - Two bumper cars at the county fair are sliding...Ch. 11 - Two bumper cars at the county fair are sliding...Ch. 11 - Prob. 56PQCh. 11 - N A bomb explodes into three pieces A, B, and C of...Ch. 11 - Prob. 58PQCh. 11 - An object of mass m = 4.00 kg that is moving with...Ch. 11 - A wooden block of mass M is initially at rest at...Ch. 11 - Prob. 61PQCh. 11 - Prob. 62PQCh. 11 - In an experiment designed to determine the...Ch. 11 - From what might be a possible scene in the comic...Ch. 11 - Prob. 65PQCh. 11 - Two pucks in a laboratory are placed on an air...Ch. 11 - Assume the pucks in Figure P11.66 stick together...Ch. 11 - Prob. 68PQCh. 11 - Prob. 69PQCh. 11 - A ball of mass 50.0 g is dropped from a height of...Ch. 11 - Prob. 71PQCh. 11 - A pendulum consists of a wooden bob of mass M...Ch. 11 - Three runaway train cars are moving on a...Ch. 11 - Prob. 74PQCh. 11 - Rutherford fired a beam of alpha particles (helium...Ch. 11 - Prob. 76PQCh. 11 - Prob. 77PQCh. 11 - February 3, 2009, was a very snowy day along...Ch. 11 - A cart filled with sand rolls at a speed of 1.0...Ch. 11 - Prob. 80PQCh. 11 - Prob. 81PQCh. 11 - Prob. 82PQCh. 11 - Prob. 83PQCh. 11 - Prob. 84PQ
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- A car crashes into a large tree that does not move. The car goes from 30 m/s to 0 in 1.3 m. (a) What impulse is applied to the driver by the seatbelt, assuming he follows the same motion as the car? (b) What is the average force applied to the driver by the seatbelt?arrow_forwardA tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 50.0 m/s and returns the shot with the ball traveling horizontally at 40.0 m/s in the opposite direction. (a) What is the impulse delivered to the ball by the tennis racquet? (b) What work does the racquet do on the ball?arrow_forwardA tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 20.0 m/s and returns the shot with the ball traveling horizontally at 40.0 m/s in the opposite direction. (a) What is the impulse delivered to the ball by the tennis racket? (b) Some work is done on the system of the ball and some energy appears in the ball as an increase in internal energy during the collision between the ball and the racket. What is the sum W Eint for the ball?arrow_forward
- Check Your Understanding What is the physical difference ( or relationship) between dmdt and dmgdt in this example?arrow_forwardA system consists of two carts that are traveling toward each other so that they will collide. Three different outcomes are shown in the figure below: elastic collision, inelastic collision, and completely (or purely) inelastic collision. Answer yes or no to the following questions: For an elastic collision, is total linear momentum conserved? For an elastic collision, is total kinetic energy conserved? For an inelastic collision, is total linear momentum conserved? For an inelastic collision, is total kinetic energy conserved? For a completely (or purely) inelastic collision, is total linear momentum conserved? For a completely (or purely) inelastic collision, is total kinetic energy conserved?arrow_forwardA wooden block is cut into two pieces, a piece AA with five times the mass of the other piece, B. A depression is made in both faces of the cut so that a firecracker can be placed in it with the block reassembled. The reassembled block is set on a rough-surfaced table, and the fuse is lit. When the firecracker explodes inside, the two blocks separate and slide apart. a) What is the ratio of the magnitudes of the distances each block travels?arrow_forward
- 2. You want to estimate from how high if it is safe to jump onto a concrete floor. For this, you consider impulse and the force of impact. If you jump from a chair of height of 0.50 m, and land on a concrete floor with stiff legs, it just starts to hurt. Therefore, you consider the average force on your body in such a landing to be your ‘safe limit’. In this case, you estimate that your body moves by about 0.75 cm during the landing. If you allow yourself to bend your knees upon landing on the same concrete floor, you are able to mitigate the force of impact. You estimate that, when bending your knees during landing, your body moves by about a foot, or 0.30 m. For the purpose of this exercise, you consider yourself with a mass of 60 kg.Given the estimates made above, from how high can you safely jump onto a concrete floor?arrow_forwardThinking back on the "Egg Throw" demonstration, which statement about the impulses experienced by the eggs is true? O The egg thrown at the sheets experienced a greater amount of impulse. O The egg thrown at the wall experienced a greater amount of impulse. O There is no way to tell with the information given. O They each experienced the same amount of impulse acting on them.arrow_forwardConsider the two pucks shown in the figure. As they move towards each other, the momentum of each puck is equal in magnitude and opposite in direction. Given that Vi, green= 11.0 m/s, and mblue is 10.0% greater than mg what are the green final speeds of each puck (in m/s), if. - - the kinetic energy of the system is converted to internal energy? 2 Vgreen V blue = 11 30.0° 130.0⁰ m/s m/sarrow_forward
- A 1.5 kg ball is dropped vertically onto the floor. It hits the floor with a speed of 30 ms-1 , and rebounds vertically with a speed of 12 ms-1. a) What is the impulse acting on the ball during the contact? b) What is the magnitude of the average force on the floor from the ball?arrow_forwardConsider a gas enclosed in a box. A molecule of mass m, having a velocity -2i+3j+4k collides with a wall parallel to the xz plane. What will be its velocity after collision and its change in momentum? i,j & k are unit vectors along the x,y & z axis. a) -2i-3j+4k, -6mj b) 2i+3j-4k, -6mj c) -2i-3j+4k, 6mj d) 2i+3j-4k, 6mjarrow_forwardA 2 kg particle is acted on by a force as shown in the image below. The particle has an initial velocity vector (before the force is applied) of ₁ = 4 + 3) m/s and a final velocity vector (after the force is applied) of ₂ = -21+ 6) m/s. The force is applied for 3 s. a. Determine the impulse that has acted on the particle b. Determine the average force applied and its angle c. The net work done by the force acting on the particle (No change in particle height) Note: The image shown below is a top-down view of the particle and force. F Xarrow_forward
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Impulse Derivation and Demonstration; Author: Flipping Physics;https://www.youtube.com/watch?v=9rwkTnTOB0s;License: Standard YouTube License, CC-BY