Work Practice Test

A block slides at a constant velocity across a horizontal, frictionless surface. A constant vertical force of magnitude F is then applied to the block. How much work is done by this new vertical force as the block continues to travel a horizontal distance $$d$$?

A block is attached to a horizontal spring with spring constant $$k$$. The block is pulled from its equilibrium position at $$x=0$$ to a position $$x=A$$. What is the work done by the spring on the block during this displacement?