Question

Consider the concepts of kinetic energy (KE) and gravitational potential energy (GPE) as you complete these questions. A ball is held 1.4 meters above the floor. Use the terms KE of GPE as your answers.
A.When the ball is held motionless above the floor, the ball possesses only? Gravitational Potential Energy.
B.If the ball is dropped, its? GPE decreases as it falls.
C.If the ball is dropped, its? KE increases as it falls.
D.In fact, in the absence of air resistance, the amount of? GPE when the ball is held motionless above the floor equals the amount of? KE at impact with the floor.

Answer 1

Answer:

All energy in the system are either potential or kinetic.

Option A to D are true

Explanation:

Kinetic Energy is the energy in a body when the body is not at rest (i.e. when it is in motion)

Whole

The potential energy of an object is energy of the body in a stored form. This means that when the body is at rest (not moving but waiting to do work). This is seen in Option A where the ball is held motionless above the floor.

The potential energy of a body decreases when the body moves downward and the kinetic energy increases. This is seen in Option B and C.

The last option D is supported by the first law of thermodynamics, also known as Law of Conservation of Energy, which states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. The potential e ergy of the body when held motionless above the floor is equal to the kinetic energy of the body when it hits the floor.