physics 2nd q exam

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In which of the following scenarios is NO net work done?

Which of the following is the rate at which work is done?

What is the average power supplied by a person with a weight of 590 N who is running up a flight of stairs a vertical distance of 4.0 m in 4.2 s?

If friction is the only force acting on an object during a given physical process, which of the following assumptions can be made in regard to the object’s kinetic energy?

An apple would have the highest gravitational potential energy when it was

A child pulls a balloon for 12 m with a force of 1.0 N at an angle 60° below horizontal. How much work does the child do on the balloon?

Unit for energy is the

Which of the following energy forms is associated with an object in motion?