Tutorials In Introductory Physics: Homework
1st Edition
ISBN: 9780130662453
Author: Lillian C. McDermott, Peter S. Shaffer
Publisher: PEARSON
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Question
Chapter 17.1, Problem 5aTH
To determine
The magnitude of work done if the block is launched along a steeper incline, but to the same vertical height and compare it with the work done in launching it at a smaller angle of incline.
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Please answer parts A, B, C, and D.
Learning Goal:
To understand the meaning and possible applications of the work-energy theorem.
Find the net work W done on the particle by the external forces during the particle's motion.
In this problem, you will use your prior knowledge to derive one of the most important relationships
in mechanics: the work-energy theorem. We will start with a special case: a particle of mass m
moving in the x direction at constant acceleration a. During a certain interval of time, the particle
accelerates from Vị to vf, undergoing displacement s given by s = af
Express your answer in terms of F and s.
Hνα ΑΣφ
Vx Vx
х.107
w = |k,-k,
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The correct answer does not depend on: kf, kj.
Solve a,b and c
Chapter 17 Solutions
Tutorials In Introductory Physics: Homework
Ch. 17.1 - 1. A hand pushes two blocks, block A and block B,...Ch. 17.1 - Prob. 1bTHCh. 17.1 - Prob. 1cTHCh. 17.1 - 1. A hand pushes two blocks, block A and block B,...Ch. 17.1 - Draw and label arrows on the diagram at points AG...Ch. 17.1 - For points B, D, and G, determine whether the...Ch. 17.1 - In the space provided, sketch a freebody diagram...Ch. 17.1 - Is the net work done on the block positive,...Ch. 17.1 - Consider reference frame R, moving downward with...Ch. 17.1 - List the forces exerted on the block after it has...
Ch. 17.1 - Write an expression for the net work done on the...Ch. 17.1 - Prob. 5aTHCh. 17.1 - Prob. 5bTHCh. 17.1 - Prob. 5cTHCh. 17.1 - Suppose the block in the previous problem were...Ch. 17.2 - In each question below, consider the interval that...Ch. 17.2 - In each question below, consider the balls just...Ch. 17.2 - When puck 1 crosses the second dotted line, is...Ch. 17.2 - When puck 1 crosses the second dotted line, is the...Ch. 17.2 - When puck 1 crosses the second dotted line, is the...Ch. 17.3 - When puck 1 cross second dotted line, is puck 2 to...Ch. 17.3 - Draw an arrow for each glider to represent the...Ch. 17.3 - Consider the following incorrect statement:...Ch. 17.3 - A firecracker is at rest on a frictionless...Ch. 17.3 - A block slides down a frictionless incline. The...Ch. 17.3 - Suppose the incline in part b is now placed on a...Ch. 17.3 - Two blocks, A and B. are connected by a massless...Ch. 17.3 - Prob. 3aTHCh. 17.3 - Prob. 3bTHCh. 17.3 - Draw momentum vectors of gliders A and B in the...Ch. 17.3 - Prob. 3dTHCh. 17.3 - Use your momentum vectors from part c to determine...Ch. 17.3 - Prob. 3fTHCh. 17.3 - In the table at right, draw the momentum vectors...Ch. 17.3 - Prob. 4bTHCh. 17.3 - Prob. 4cTHCh. 17.3 - Prob. 4dTHCh. 17.3 - Prob. 4eTHCh. 17.3 - Prob. 4fTHCh. 17.4 - In the space provided, draw separate arrows...Ch. 17.4 - Prob. 1bTHCh. 17.4 - In the space provided, draw separate arrows for...Ch. 17.4 - Prob. 2bTHCh. 17.4 - Construct and label a vector showing the initial...Ch. 17.4 - Object A collides on a horizontal frictionless...Ch. 17.4 - On the same horizontal surface, object C collides...Ch. 17.4 - Consider the following incorrect statement:...
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- A force F(x)=(3.0/x)N acts on a particle as it moves along the positive x-axis. (a) How much work does the force do on the particle as it moves from x=2.0 m to x=5.0 m? (b) Picking a convenient reference point of the potential energy to be zero at x=, find the potential energy for this force.arrow_forward(a) Calculate the work done on a 1500-kg elevator car by its cable to lift it 40.0 m at constant speed, assuming friction averages 100 N. (b) What is the work done on the lift by the gravitational force in this process? (c) What is the total work done on the lift?arrow_forward(a) For what values of the angle between two vectors is their scalar product positive? (b) For what values of is their scalar product negative?arrow_forward
- In three cases, a force acts on a particle, and the particle is displaced from an initial position to a final position. Figure 9.11 (page 255) shows the position-versus-force graphs, indicating the initial and final positions of the particle in each case. Find the work done by the force on the particle and sketch the force and displacement vectors along with the appropriate axis in each case.arrow_forwardSomeone drops a 50 — g pebble off of a docked cruise ship, 70.0 m from the water line. A person on a dock 3.0 m from the water line holds out a net to catch the pebble. (a) How much work is done on the pebble by gravity during the drop? (b) What is the change in the gravitational potential energy during the drop? If the gravitational potential energy is zero at the water line, what is the gravitational potential energy (c) when the pebble is dropped? (d) When it reaches the net? What if the gravitational potential energy was 30.0 Joules at water level? (e) Find the answers to the same questions in (c) and (d).arrow_forwardAlex and John are loading identical cabinets onto a truck. Alex lifts his cabinet straight up from the ground to the bed of the truck, whereas John slides his cabinet up a rough ramp to the truck. Which statement is correct about the work done on the cabinet-Earth system? (a) Alex and John do the same amount of work, (b) Alex does more work than John, (c) John does more work than Alex, (d) None of those statements is necessarily true because the force of friction is unknown, (e) None of those statements is necessarily true because the angle of the incline is unknown.arrow_forward
- Suppose that the air resistance a car encounters is independent of its speed. When the car travels at 15 m/s, its engine delivers 20 hp to its wheels. (a) What is the power delivered to the wheels when the car travels at 30 m/s? (b) How much energy does the car use in covering 10 km at 15 m/s? At 30 m/s? Assume that the engine is 25 efficient. (c) Answer the same questions if the force of air resistance is proportional to the speed of the automobile. (d) What do these results, plus your experience with gasoline consumption, tell you about air resistance?arrow_forwardA block of weight w sits on a frictionless inclined plane, which makes an angle with respect to the horizontal, as shown. (Figure 1)A force of magnitude F, applied parallel to the incline, pulls the block up the plane at constant speed. Figure 0 1 of 1arrow_forwardAnalyze the given problem and answer the following questions. Make sure to show your complete and detailed solution.arrow_forward
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