A mass m fish is attached to the lower end of a vertical ideal spring that has negligible mass and force constant k. Initially, the spring is neither stretched nor compressed. The fish is released from rest. The acceleration of gravity is –g. Just after the fish is released from rest, which describes the work done on the fish?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Hydrogen and helium are both members of?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.