Phys-Presentation 4.2 Understanding Mechanical Energy

Front

What is mechanical energy?

Back

The sum of kinetic energy and potential energy in a system.

Front

Define gravitational potential energy.

Back

The energy an object has due to its position in a gravitational field.

Front

What is kinetic energy?

Back

The energy an object has due to its motion.

Front

What is magnetic potential energy?

Back

The ability of an object to do work due to its position and orientation in a magnetic field.

Front

At the top of a ramp, what type of energy does a skateboarder have?

Back

Potential Energy.

Front

How does height affect potential energy?

Back

Potential energy increases with height in a gravitational field.

Front

What happens to kinetic energy as an object slows down?

Back

Kinetic energy decreases as the object's speed decreases.

Front

Fill in the blank: Twice the height yields _______ the speed.

Back

More than twice.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy is proportional to the square of the speed.

Front

What is the formula for gravitational potential energy?

Back

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