Suppose you have to move a heavy crate of weight 875 N by sliding it along a horizontal concrete floor.

Suppose you have to move a heavy crate of weight 875 N by sliding it along a horizontal concrete floor. You push the crate to the right with a horizontal force of magnitude 300 N, but friction prevents the crate from sliding. Assume that the crate is sliding along the floor with constant velocity. What is the magnitude Fp of the force you need to exert on the crate to make it continue to slide along the floor with constant velocity?