A boy with a mass of 30 kg stands motionless at the end of a diving board 3 m above the floor. The boy has:
Answer
no energy.
kinetic energy only.
potential energy only.
both kinetic and potential energy.
Potential energy, as the boy is not in motion and is suspended above the ground.
If you wanted to find the energy, the equation is;
PE = mgh
PE = 30 x 9.8 x 3
PE = 882J
To determine the energy that the boy has, we can consider the two types of energy: kinetic energy and potential energy.
Kinetic energy is the energy of an object due to its motion. Since the question states that the boy is standing motionless, he has no kinetic energy.
Potential energy is the energy that an object possesses due to its position or height in a gravitational field. In this case, the boy is standing at the end of a diving board, 3 m above the floor. This means that the boy has potential energy due to his elevated position.
Therefore, the boy in this scenario has potential energy only.