Question

A particle of unit mass moves along a smooth horizontal surface under the action of a horizontal force of magnitude (5 - KVSJN, where S is its distance
from a fixed point on the surface. The force is directed always away from O. If it starts from rest at O and comes to instantaneous rest again 400 from O,
the value of the constant K will be​

Answer 1

Answer:

Answer is 3/8(A) Trust me it's true