COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 13QAP
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The flaws in the reasoning which a boxer claims that while boxing
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11. Which of the following equations represents Newton's 2nd Law?
A. S = D/T
C. F=MX A
B. D= M/V
D. A = AV/T
12. Which of the following surfaces would have the least friction?
A. Hard wood floor
C. Ice rink
B. Cement driveway
D. Gravel road
13. Which is an example of a balanced force?
A. A dog chasing a cat?
B. One car hits another car and changes direction.
C. A vase sitting on a table.
D. A baseball flying into the outfield.
14. Which object has the greatest gravitational force?
D.
C.
B.
A.
30 kg
40 kg
50 kg
Level 3 Questions
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2. A cart is arranged on a track as shown below. Ignore the friction on the incline surface.
a) Sketch a free body diagram of the cart.
b) Sketch a free body diagram of the mass (m).
C) If the mass of the cart (M) is 500 g and the angle of the incline is 30°, what must be the mass (m) so
that the cart is rest on the ramp?
Good day Sir/Maam, I hope you can help me with this..... thank u
Topic:
Newton’s Laws of Motion
Conceptual Question: Twenty people participate in a tug-of-war. The two teams of ten people are so evenly matched that neither team wins. After the game they notice that a car is stuck in the mud. They attach the tug-of-war rope to the bumper of the car, and all the people pull on the rope. The heavy car has just moved a couple of decimeters when the rope breaks. Why did the rope break in this situation when it did not break when the same twenty people pulled on it in a tug-of-war?
Chapter 4 Solutions
COLLEGE PHYSICS
Ch. 4 - Prob. 1QAPCh. 4 - Prob. 2QAPCh. 4 - Prob. 3QAPCh. 4 - Prob. 4QAPCh. 4 - Prob. 5QAPCh. 4 - Prob. 6QAPCh. 4 - Prob. 7QAPCh. 4 - Prob. 8QAPCh. 4 - Prob. 9QAPCh. 4 - Prob. 10QAP
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- Train Collision and Newtons First Law A group of college students discusses the train collision case study. Use Newtons first law to decide which underlined statements are correct and which are false. Explain your answers. Shannon: This newspaper says that the people who got really hurt were either standing up or sitting in a forward-facing seat. Those people got thrown forward when the train stopped. Avi: Thats why there are seat belts in cars. If you get into a crash, the force can throw you through the windshield. Cameron: There is no force that throws you through the windshield. You fly through the windshield because you are already moving and it would take a force to stop you from going forward. Thats why theres a seat belt. Avi: That doesnt make sense. Because then you would need a force to stop you from flying through the windshield even when you just stop slowly at a red light. Cameron: Thats right, but when you slow down slowly, you dont need such a big force and the car seat can take care of it. Shannon: The seat? I dont think a seat can exert a force. It cant move on its own or hold you. Thats why the people who were sitting forward on the train were hurt. The people who were sitting backward had the back of the seat to block them.arrow_forwardWhen a 1.50-kg dress hangs midway from a taut clothesline stretched between two poles planted 7.50 m apart, the clothesline is seen to sag 0.0500 m. a. Draw a free-body diagram of the dress. b. What is the tension produced on the clothesline by the dress? Assume the clothesline is massless.arrow_forwardTwenty people participate in a tug-of-war. The two teams of ten people are so evenly matched that neither team wins. After the game they notice that a car is stuck in the mud. They attach the tug-of-war rope to the bumper of the car, and all the people pull on the rope. The heavy car has just moved a couple of decimeters when the rope breaks. Why did the rope break in this situation when it did not break when the same twenty people pulled on it in a tug-of-war?arrow_forward
- A person holds a ball in her hand, (a) Identify all the external forces acting on the ball and the Newton's third-law reaction force to each one. (b) If the ball is dropped, what force is exerted on it while it is falling? Identify the reaction force in this case. (Ignore air resistance.)arrow_forwardA small steel I-beam (Fig. P6.14) is at rest with respect to the steel surface of a truck. The truck is accelerating with respect to the road. The mass of the I-beam is 5.8 103 kg. a. Draw a free-body diagram for the I-beam. b. What force or forces accelerate the I-beam with respect to the ground? c. The I-beam must remain at rest with respect to the truck. What is the maximum acceleration of the truck? Evaluate your answer. d. On the highway, the truck moves with a constant velocity. Draw a free-body diagram for the I-beam. Compare it with your diagram in part (a). FIGURE P6.14arrow_forwardWhen a person pushes on a wall, the wall pushes on the person (Newtons third law). Suppose the person puts a block of wood between his or her hand and the wall. Analyze the forces on the block of wood. Why doesnt it move?arrow_forward
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