Question

potential energy an object gains a different type of energy when it is stretched. the potential energy is associated with objects that can be stretched or compressed. for example, when an archer pulls back an arrow, the bow changes shape. the bow now has elastic potential energy. when the archer releases the string, the stored energy makes the arrow flying to its target. what type of energy does a bow have when you pull back an arrow? b. explaining what factors affect an objects kinetic energy? c. problem solving at a given height above earth, how would you determine the potential energy of a sky - diver? the kinetic energy of a sky - diver?

Explanation:

Step1: Identify energy type for bow

When pulling back an arrow on a bow, the bow deforms and stores elastic - potential energy.

Step2: Factors for kinetic energy

The kinetic energy of an object is affected by its mass ($m$) and velocity ($v$), given by the formula $KE=\frac{1}{2}mv^{2}$.

Step3: Potential energy of skydiver

The gravitational - potential energy of an object at a height $h$ above the Earth's surface is given by $PE = mgh$, where $m$ is the mass of the skydiver, $g$ is the acceleration due to gravity ($g\approx9.8m/s^{2}$), and $h$ is the height. The kinetic energy of the skydiver can be found using $KE=\frac{1}{2}mv^{2}$, where $v$ is the velocity of the skydiver.

Answer:

a. Elastic - potential energy.
b. Mass and velocity.
c. Potential energy: $PE = mgh$; Kinetic energy: $KE=\frac{1}{2}mv^{2}$