Unit 3 Week 2 Potential and Kinetic Energy

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. It has the potential to do work when released.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its velocity.

Front

What is the formula for calculating kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.

Front

Give an example of potential energy.

Back

An example of potential energy is a book resting on a shelf or an apple sitting on the edge of a table.

Front

Give an example of kinetic energy.

Back

An example of kinetic energy is a tennis ball rolling across the court or a car driving down the road.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, assuming no energy is lost to air resistance.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the potential energy an object has due to its height above the ground, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How does mass affect kinetic energy?

Back

Kinetic energy increases with mass; if the mass of an object doubles, its kinetic energy also doubles if the velocity remains constant.

Front

How does velocity affect kinetic energy?

Back

Kinetic energy increases with the square of the velocity; if the velocity doubles, the kinetic energy increases by a factor of four.

Front

What is the relationship between potential and kinetic energy in a closed system?

Back

In a closed system, the total mechanical energy (potential + kinetic) remains constant, assuming no external forces do work.