Mechanical energy transfer

A 60.0 kg person walks from the ground to the roof of a 74.8 m tall building. How much gravitational potential energy does she have at the top of the building?

• 43982.4 J
• 63982.3 J
• 43962.4 J
• 83942.4 J

Tags

NGSS.HS-PS2-4

A pitcher throws a 0.145 kg baseball at a velocity of 30.0m/s. How much kinetic energy does the ball have?

• 65.35 J
• 87.25 J
• 23.45 J
• 65.25 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A boulder with a mass of 2,500kg rests on a ledge 200m above the ground. What is the boulder's gravitational potential energy (GPE)?

Tags

NGSS.HS-PS2-4

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.)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

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

• 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?

• 1225 J

• 180000 J

• 294 J

• 3920000 J

Tags

NGSS.MS-PS3-1

A girl of mass 40kg jumps out of a window which is 8m above the ground. Her kinetic energy just before she hits the ground is

• 3200J

• 4000J

• 320J

• We need more information to answer this question

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A rabbit of mass 4.0kg is running at a speed of 5m/s. The energy in its kinetic store is

• 10J

• 20J

• 50J

• 100J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

The rabbit (mass 4.0kg) then doubles its speed from 5m/s to 10m/s. Its kinetic energy

• halves

• doubles

• increases x 4

• decreases x 4

A car of mass 800kg has 90kJ of energy in its kinetic store. How fast is it moving?

• 10.6m/s

• 15.0m/s

• 112m/s

• 11.25m/s

Tags

NGSS.HS-PS3-1