8 - L28 Energy Review

Front

What is Potential Energy (PE)?

Back

Potential Energy (PE) is the energy stored in an object due to its position or height. It can be calculated using the formula PE = mass × gravity × height.

Tags

NGSS.MS-PS3-2

Front

What is the formula to calculate Gravitational Potential Energy?

Back

The formula to calculate Gravitational Potential Energy is PE = mgh, where m is mass (in kg), g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height (in meters).

Tags

NGSS.MS-PS3-2

Front

Calculate the PE of an object with a mass of 300 kg at a height of 45 m.

Back

PE = mgh = 300 kg × 9.81 m/s² × 45 m = 132,300 J.

Front

Which type of energy is due to an object's height or position?

Back

Gravitational Potential Energy.

Tags

NGSS.MS-PS3-2

Front

What is the PE of a skateboarder who weighs 70 Newtons on a ramp that is 3.5 meters high?

Back

PE = mgh = 70 N × 3.5 m = 245 J.

Tags

NGSS.MS-PS3-2

Front

What is another term for 'stored energy'?

Back

Potential Energy.

Tags

NGSS.MS-PS3-2

Front

What is the PE of a coconut that weighs 2.5 Newtons at the top of a 30 meter tree?

Back

PE = mgh = 2.5 N × 30 m = 75 J.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy of an object in motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Front

How does height affect Potential Energy?

Back

As the height of an object increases, its Potential Energy increases because it has more stored energy due to its position.

Front

What is the relationship between mass and Potential Energy?

Back

Potential Energy is directly proportional to mass; as mass increases, Potential Energy increases if height remains constant.