An archer draws back the string of his bow and fires an arrow toward a target. What converts the potential energy of the bow into the kinetic energy of the arrow
Force
Work
Momentum
Time

Force

Explanation:

Mechanical energy, which refers to the energy of an object due to motion or position, is of two types viz: kinetic energy and potential energy. Kinetic energy is the energy of an object in motion while potential energy is the energy of an object at rest. These two (kinetic and potential) makes up the mechanical energy. Kinetic energy and potential energy are interconvertible.

In this question involving a bow, the bow is at a state of rest when the string is unpulled i.e. possess potential energy. It becomes kinetic energy when the archer pulls the string in order for the arrow to move in a particular direction. FORCE is what is required to pull the string, hence, force is what changes the potential energy of that bow to kinetic energy.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.