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 4.2, Problem 1bT
Draw a free-body diagram for the ruler (after it is released from rest). Draw your vectors on the diagram at right. Draw each force at the point at which it is exerted.
Label each force by identifying:
- the type of force.
- the object on which the force is exerted, and
- the object exerting the force.
The diagram you have drawn is called an external free-body diagram.
Is the point at which you placed the gravitational force in your diagram consistent with your knowledge of the net torque about the pivot? Explain.
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Students have asked these similar questions
**18. A block slides down an inclined ramp, speeding up as it goes. The ramp is not friction
less (u0.50). The ramp makes an angle of 53° with respect to the horizontal, as shown at
right
a) Draw a free-body diagram for the block. Label your forces using the method
explained on page 85
b) If the magnitude of the normal force is 90 N, find the mass of the block
530
c) Find the acceleration (magnitude and direction) of the block.
1
d. What is the acceleration of the box? (magnitude and direction)
e. One of the forces on your free body diagram should be the normal force
(make sure it is there!). For the normal force, what is the object, and what is
the agent?
f.
Is there a Newton's third law force pair associated with the normal force
acting on the box?
You throw a ball straight up at v_0 (you are on the ground). Derive an expression for the highest point that the ball reaches. Derive an expression for the time it takes to get to the highest point. Derive and expression for the time it takes to come back to you. Be sure you use diagrams and clearly define your coordinate system. All you answers will be symbolic. Show all of your algebra steps. Discuss what forces are acting on the ball after it leaves you hand. Discuss what direction that force is.
Chapter 4 Solutions
Tutorials in Introductory Physics
Ch. 4.1 - Draw arrows on the diagram to represent the...Ch. 4.1 - Mark the position of each of the labeled points at...Ch. 4.1 - Suppose the wheel makes one complete revolution in...Ch. 4.1 - Would two observers on either side of a rotating...Ch. 4.1 - The diagrams at right show top and side views of...Ch. 4.1 - In the space at right sketch the position vectors...Ch. 4.1 - Let | in terms of |o| . 1. The wheel is made to...Ch. 4.1 - Suppose the wheel slows down uniformly, so that ||...Ch. 4.1 - A force of magnitude Fo is applied to point M as...Ch. 4.1 - Compare the magnitude of the net torque about the...
Ch. 4.2 - A ruler is placed on a pivot and held at an angle...Ch. 4.2 - Draw a free-body diagram for the ruler (after it...Ch. 4.2 - How would your free-body diagram change if the...Ch. 4.2 - Predict: which spool will reach the floor first....Ch. 4.2 - Obtain two spools and a ring stand. Use the...Ch. 4.2 - Consider the following discussion between three...Ch. 4.2 - Write down Newton’s second law for each spool....Ch. 4.3 - A T-shaped board of uniform mass density has two...Ch. 4.3 - Prob. 1bTCh. 4.3 - Attach day to the bottom left side of the board so...Ch. 4.3 - Prob. 2bTCh. 4.3 - C. Imagine that the T-shaped board (with no clay...
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