A Practice Situation: A 24 kg box is being pulled by a horizontal rope along a f

Question

A Practice Situation: A 24 kg box is being pulled by a horizontal rope along a floor at a constant speed (v = 1.0m/s). There is friction between the floor and the box with ?k = 0.40. 4. The formula for tension in the rope is given by: a) T = ?k gcos? b) T = Fnsin? c) T = ?k mg d) none of these 5. The magnitude of the tension is given by: a) 94N b) 117N c) 3.9N d) none of these 6.) Contact forces are: a. friction and gravity b. the normal force and friction c. tension and the normal force d. none of these 7.) To cause an object to start moving on a frictional surface requires a. less force than is needed to keep it moving on the surface. b. the same force as is needed to keep it moving on the surface. c. more force than is needed to keep it moving on the surface. d. none of these.

Explanation / Answer

c b a c

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