Two masses of 2 kg and 4 kg are connected by a light string passing over a light, frictionless pulley. If the system is released from rest, determine the velocity of the 4 kg mass when it has...

Two masses of 2 kg and 4 kg are connected by a light string passing over a light, frictionless pulley. If the system is released from rest, determine the velocity of the 4 kg mass when it has descended a distance of 1.4 m.

A cutting tool operates against a constant resistive force of 2000 N. If the tool moves through a distance of 150 mm in 6 s, what is the power used?