Question

You have a machine which can accelerate pucks on frictionless ice. Starting from rest, the puck...

You have a machine which can accelerate pucks on frictionless ice. Starting from rest, the puck travels a distance x in time t when force F is applied. If force 1/4F is applied, the distance the puck travels in time t is



a. 1/2x.
b. 4x.
c. 2x.
d. 3x.
e. 1/4x.

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Answer #1

Ans

As the puck starts from rest so initial speed u = 0 m/s

With force F acceleration is

m is mass of puck.

distance covered x in time t. So

......................(1)

Now the force applied is F/4. So distance covered

Using equation 1

therefore option (e) is correct.

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