Calculating Kinetic and Gravitational Energies

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters? (acceleration of gravity = 9.8m/s²)

GPE = (mass) x (acceleration of gravity) x (height)

• 3920000 J

• 294 J

• 180000 J

• 1225 J

Tags

NGSS.HS-PS3-1

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.) (acceleration of gravity = 9.8m/s²)

GPE = (mass) x (acceleration of gravity) x (height)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Tags

NGSS.MS-PS3-2

What is the kinetic energy of a 1,600kg Mustang travelling at 15 m/s (33mph)?

KE = ½(mass) x (velocity)²

• 180000 J

• 294 J

• 1225 J

• 3920000 J

Tags

NGSS.HS-PS3-2

A 50kg (100lb) person is running at 7m/s (about 16 mph). How much kinetic energy do they have?

KE = ½(mass) x (velocity)²

• 1225 J

• 180000 J

• 294 J

• 3920000 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the unit for mass?

• kilogram (kg)

• meter (m)

• Newton (N)

• Joule (J)

What is the unit for distance?

• kilogram (kg)

• meter (m)

• Newton (N)

• Joule (J)

Tags

NGSS.HS-PS4-1

What is the unit for energy?

• kilogram (kg)

• meter (m)

• Newton (N)

• Joule (J)

A 2kg television falls from 1 meter. How much energy does it have? (acceleration of gravity = 9.8m/s²)

GPE = (mass) x (acceleration of gravity) x (height)

• 19.6 J

• 196 J

• 2 J

• 9.8J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s.

KE = ½(mass) x (velocity)²

• 18 J

• 36 J

• 12 J

• 6 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?

KE = ½(mass) x (velocity)²

• 9 J

• 18 J

• 27 J

• 2 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4