A person is straining to lift a large crate, without success because it is too h

Question

A person is straining to lift a large crate, without success because it is too hea on the crate as force exerted on the crate by the floor, and W is the weight of the crate. How are the maghitudes of these forces related while the person is trying unsuccessfully to lift the crate? A)P+C- w 7. vy. We denole the forces is the vertical contact follows: P is the upward force the person exerts on the crate, C A string is attached to the rear-view mirror of a car. A ball is hanging at the other end of the string. The car is driving around in a circle, at a constant speed. Which of the following lists gives all the forces directly acting on the ball? A) tension and gravity B) tension C) tension, gravity, and the centripetal force D) tension, gravity, the centripetal force, and friction 8. Two objects have masses m and Sm, respectively. They both are placed side by side on a frictionless inclined plane and allowed to slide down from rest 9. ttom of the incline than the heavier object. C it takes the heavier object 5 times longer to reach the bottom of the incline than the lighter object. Dj it takes the heavier object 10 times longer to reach the bottom of the incline than the lighter object B) It takes the lighter object 10 times longer to reach the bottom of the incline than the heavier object. E) The two objects reach the bottom of the incline at the same time.

Explanation / Answer

7. A) P+C = W  

8. C) Tension gravity and centripital force  

9) E) The two object reach the bottom at the same time.

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