A block initially at rest is pushed horizontally along a frictionless surface with a constant force.
After moving a distance d the speed of the block is v. What is the speed of the block after being
pushed a distance 2d?

Question

A block initially at rest is pushed horizontally along a frictionless surface with a constant force.
After moving a distance d the speed of the block is v. What is the speed of the block after being
pushed a distance 2d?

anonymous · Answer

Find the acceleration from:
V2^2 = V1^2 + 2ad      with V1 = 0
Then you can find the velocity at 2d from the same equation.

anonymous · Answer

v=sqrt(2 a d) thus after 2d you get sqrt(2)*v