Question

A ball of mass 50 g is suspended at a height of 2.5 m from the ground. In terms of the gravitational
potential energy (GPE) and kinetic energy (KE) of the ball, which of the following statements is
correct?

A GPE is maximum, KE is 0
B. KE is maximum, GPE is 0
C. GPE = KE at this point
D. the ball has no GPE
​

Answer 1

Answer:

A

Explanation:

Finding Gravitational Potential Energy :

GPE = mass x gravitational acceleration x height

• GPE = 50 x 10⁻² x 10 x 2.5
• GPE = 5 x 2.5
• GPE = 12.5 J

Finding Kinetic Energy :

KE = 1/2 x mass x (velocity)²

• KE = 1/2 x 5 x 10⁻² x (0)²
• KE = 0

Hence, option A is correct.