Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 3.1, Problem 2bT
The diagrams at right show two identical gliders that move to the right without friction. The hands exert identical, horizontal forces on the gliders. The second glider experiences an additional, smaller force from a massless string held as shown.
Suppose the gliders move through identical displacements.
Is the work done on glider 1 by the hand greater than, less than, or equal to the work done on glider 2 by the hand? Explain.
Is the change in kinetic energy of glider 1 greater than, less than, or equal to the change in kinetic energy of glider 2? Base your answer on your knowledge of the net work done on each object.
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Two objects of different mass start from rest and are pulled horizontally with
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block, and is pulled with a force of 45.0 N at an angle 0 above the horizontal,
as shown in the figure(Figure 1). After the block is pulled through a distance of
1.50 m, its speed is 2.60 m/s, and 50.0 J of work has been done on it.
Part A
What is the angle 0?
?
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Part B
Figure
< 1 of 1
What is the mass of the block?
?
F = 45.0 N
v = 0
Tm =
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1.50 m
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Two blocks are connected by a very light string passing over a massless and frictionless pulley (Figure 1) Traveling at constant speed, the 20.0 NN block moves 90.0 cmcm to the right and the 12.0 NN block moves 90.0 cmcm downward.
1.
During this process, how much work is done on the 12.0 NN block by gravity?
Express your answer with the appropriate units.
2.
During this process, how much work is done on the 12.0 NN block by the tension in the string?
Express your answer with the appropriate units.
3.
During this process, how much work is done on the 20.0 NN block by gravity?
Express your answer with the appropriate units.
4.
During this process, how much work is done on the 20.0 NN block by the tension in the string?
Express your answer with the appropriate units.
5.
During this process, how much work is done on the 20.0 NN block by friction?
Express your answer with the appropriate units.
6.
During this process, how much work is done on the 20.0 NN block by the normal…
Chapter 3 Solutions
Tutorials in Introductory Physics
Ch. 3.1 - A block is moving to the left on a frictionless,...Ch. 3.1 - In a separate experiment, two hands push...Ch. 3.1 - Shown at right is a side-view diagram of the...Ch. 3.1 - Recall the motion of the block in part B. For each...Ch. 3.1 - Generalize from your answers to pans A—D to...Ch. 3.1 - A glider, glider A, Is pulled by a suing across a...Ch. 3.1 - The diagrams at right show two identical gliders...Ch. 3.1 - A block on a frictionless table is connected to a...Ch. 3.2 - Three students discuss the final momentum and...Ch. 3.2 - Which cart takes longer to travel between the two...
Ch. 3.2 - Use Newton's second law and the definition of...Ch. 3.2 - How does the net work done on cart A(Wnet,A)...Ch. 3.2 - Refer again to the discussion among the three...Ch. 3.2 - Release the ball so that it rolls straight toward...Ch. 3.2 - Release the ball at an angle to the ramp as shown...Ch. 3.2 - How does the direction of the net force on the...Ch. 3.2 - How does the change in kinetic energy of the ball...Ch. 3.2 - For motion 1, draw vector in region II of the...Ch. 3.2 - For motion 2, draw vectors in region II of the...Ch. 3.2 - Consider the change in momentum vectors you...Ch. 3.3 - What differences between gliders M and N could...Ch. 3.3 - For experiment 1,draw and label separate free-body...Ch. 3.3 - In the spaces provided, draw and label vectors to...Ch. 3.3 - A student compares the final speeds of gliders M...Ch. 3.3 - A. Suppose that glider D is free to move and...Ch. 3.3 - A second experiment is performed in which glider D...Ch. 3.3 - Consider the two experiments described above. When...Ch. 3.3 - When the momentum of an object or system of...Ch. 3.3 - Two students the second experiment, in which...Ch. 3.4 - Draw separate free-body diagrams for each block...Ch. 3.4 - Rank the magnitudes of all the horizontal forces...Ch. 3.4 - The velocity vectors for blocks A and B are shown...Ch. 3.4 - Use your knowledge of the velocities and changes...Ch. 3.4 - Draw and label a free-body diagram for system C at...Ch. 3.4 - Write an equation for the momentum of system C in...Ch. 3.4 - Generalize from your results to answer the...Ch. 3.4 - Imagine a single object whose mass is equal to the...Ch. 3.4 - What are the external forces exerted on system C...Ch. 3.4 - The momentum vectors of each block before the...Ch. 3.4 - Draw arrows that represent the direction of the...
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