Review: Kinetic and Potential Energy

Front

What is the unit of measure for force?

Back

Newtons

Front

What is the gravitational potential energy of a 10kg object that is 5m above the ground? (Assuming g=9.8m/s²)

Back

490J

Front

What is the SI unit for work and energy?

Back

Joule

Front

What does the law of conservation of energy state?

Back

Energy cannot be created or destroyed, only transformed.

Front

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

Back

The potential energy decreases while the kinetic energy increases.

Front

Define kinetic energy.

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv².

Front

Define potential energy.

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy.

Front

What is the formula for gravitational potential energy?

Back

PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the relationship between kinetic energy and mass?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases.

Front

What happens to the total mechanical energy in a closed system?

Back

The total mechanical energy remains constant if only conservative forces are acting.