Newton's Laws Unit Test
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Question
Two movers are attempting to push a couch up a ramp. One mover applies a force of 80 N to the right, but the force of friction between the couch and the ramp is providing a force of 110 N in the opposite direction, and the couch slides down the ramp.
At minimum, how much force will the second mover need to apply to help push the couch up the ramp?
(1 point)
Responses
80 N
80 N
110 N
110 N
30 N
30 N
31 N
30 N
To determine the minimum amount of force the second mover needs to apply to help push the couch up the ramp, we need to consider the forces involved.
The force applied by the first mover is 80 N to the right. The force of friction between the couch and the ramp is providing a force of 110 N in the opposite direction.
To counteract the force of friction and start pushing the couch up the ramp, the second mover needs to provide a force greater than the force of friction. Therefore, the minimum force the second mover needs to apply is 110 N. Hence, the correct answer is:
110 N
To find out how much force the second mover needs to apply to help push the couch up the ramp, we need to consider the forces acting on the couch.
First, we have the force applied by the first mover to the right, which is 80 N. This force is trying to push the couch up the ramp.
Second, we have the force of friction between the couch and the ramp, which is 110 N in the opposite direction. This force is trying to slide the couch down the ramp.
Since the couch is sliding down the ramp, the force of friction is currently greater than the force applied by the first mover. To counteract the force of friction and push the couch up the ramp, the second mover needs to apply a force that is greater than the force of friction.
Therefore, the correct answer is 110 N (the force of friction). The second mover needs to apply a force of at least 110 N to help push the couch up the ramp.