Directions: Identify what law of motion is being shown in the following situations.1. When an astronaut is drifting in space, he will travel at a constant speed in astraight line forever if no force act on it.2. Lighter vehicles accelerate faster than heavier vehicles.3. When we walk on the ground, our foot pushes the ground backward, and as areaction, the ground pushes our foot forward.4. When you push a cart, the cart pushes back against you.5. Men in space find it more difficult to stop moving because of lack of gravityacting against them.6. Pulling a table cloth out under plates.7. Two opposing team playing tug of war.8. Firing a gun.9. Hammering a nail.10. When you are driving a car, and you hit the break and your body moved forward.

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Directions: Identify what law of motion is being shown in the following situations. 1. When an astronaut is drifting in space, he will travel at a constant speed in a straight line forever if no force act on it. 2. Lighter vehicles accelerate faster than heavier vehicles. 3. When we walk on the ground, our foot pushes the ground backward, and as a reaction, the ground pushes our foot forward.

Directions: Identify what law of motion is being shown in the following situations. 1. When an astronaut is drifting in space, he will travel at a constant speed in a straight line forever if no force act on it. 2. Lighter vehicles accelerate faster than heavier vehicles. 3. When we walk on the ground, our foot pushes the ground backward, and as a reaction, the ground pushes our foot forward.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

Directions: Identify what law of motion is being shown in the following situations.
1. When an astronaut is drifting in space, he will travel at a constant speed in a
straight line forever if no force act on it.
2. Lighter vehicles accelerate faster than heavier vehicles.
3. When we walk on the ground, our foot pushes the ground backward, and as a
reaction, the ground pushes our foot forward.
4. When you push a cart, the cart pushes back against you.
5. Men in space find it more difficult to stop moving because of lack of gravity
acting against them.
6. Pulling a table cloth out under plates.
7. Two opposing team playing tug of war.
8. Firing a gun.
9. Hammering a nail.
10. When you are driving a car, and you hit the break and your body moved forward.

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Q4. An 80 kg dog is lying on the floor at rest. The coefficient of kinetic friction between the dog and the floor is μ = 0.2. Ignore static friction. If the dog is pulled by a person with a 200 N force as shown, determine the speed of the dog when t = 3 s. [Do NOT use the equations of motion i.e. Σ F = ma, directly; otherwise your solution to this qustion will receive a zero]. 60⁰ P-200 N
A ball is hanging from a bracket fixed to the wall of an elevator. The elevator is accelerating in the upward direction. What is the reaction force (required by the third law of motion) to the force of gravity on the ball? A. (a) The mass of the ball. B. (b) The gravitational pull of the ball on the earth. C. (c) The gravitational pull of the earth on the ball. D. (d) The tension force of the ball on the rope. E. (e) The tension force of the rope on the ball. F. (f) The tension force of the rope on the bracket. G. (g) The force acting on the elevator to accelerate it. H. (h) A force between the elevator and the bracket, acting on one or the other. I. (i) None of the above.
Question 3
A and B
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