Question

Using a horizontal force of 200 N we extend to move a wooden cabinet across a floor at a constant velocity. The frictional force exerted on the cabinet is

a. 200 N

b. 300 N

c. 100 N

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Answer 1

Answer:

For an object to move with constant velocity, net external force experienced by it must be equal to ZERO i.e F external = 0

Thus a friction of 200 N must be exerted on the cabinet so that it moves with a constant velocity under the applied horizontal force of 200 N.

Answer 2

Answer:

a. 200 N

• Since, a horizontal force of 200N is used to move a wooden cabinet, thus a friction force of 200N will be exerted on the cabinet. Because according to third law of motion, an equal magnitude of force will be applied in the opposite direction