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 3.3, Problem 2dT
When the momentum of an object or system of objects does not change with time, the momentum of the object or system is said to be conserved.
On the basis of your results above, describe the circumstances under which the momentum of an object or system of objects is conserved.
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Use the worked example above to help you solve this problem. Two billiard balls of identical mass move toward each other as shown in the figure. Assume that the collision between them is perfectly elastic. If the initial velocities of the balls are v1i= +25.2 cm/s and v2i = −20.3 cm/s, what are the velocities of the balls after the collision? Assume friction and rotation are unimportant. (Indicate the direction with the sign of your answer.)
In the figure on right, block 1 of
mass m₁ moves a frictionless floor as shown
with an initial speed of V₁i 5.00 m/s. It
undergoes a one-dimensional elastic
collision with a resting block 2 of mass m₂ = 0.500m₁. Then block 2 undergoes a
0.500m₂.
one-dimensional elastic collision with stationary block 3 of mass m²
What then is the speed of block 3?
Compare the kinetic energy, and the momentum of block 3 with the
kinetic energy and momentum of block 1? Does the answer make sense?
determine the ratio of impulse of Block1 to the impulse
a.
b.
C.
of block 3 after the collision.
1
2
3
Three objects A, B, and C are moving as shown in (Figure 1). Assume that Va = 10.6 m/s , Vb = 10.0 m/s, and Vc = 4.00 m/s.
Find the x component of the net momentum of the particles if we define the system to consist of A and C.
Find the y component of the net momentum of the particles if we define the system to consist of A and C.
Find the x component of the net momentum of the particles if we define the system to consist of B and C.
Find the y component of the net momentum of the particles if we define the system to consist of B and C.
Find the x component of the net momentum of the particles if we define the system to consist of all three objects.
Find the y component of the net momentum of the particles if we define the system to consist of all three objects.
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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