Science Energy

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

KE = (0.5)(m)(v²)

• 1225 J

• 180000 J

• 294 J

• 3920000 J

Answer explanation

KE = (0.5)(50 kg)(7 m/s)²

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Increasing an object's speed will increase its kinetic energy.

• false

• true

Tags

NGSS.MS-PS3-1

Which of the following objects has kinetic energy?

• A lamp that is turned off

• A bike parked at the top of a hill

• a ball thrown across the yard

• Fallen leaves laying on the ground below a tree

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Where is potential energy at its minimum?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

Energy that transforms from potential to kinetic is neither_____ nor _______.

• created, force

• created, destroyed

• force,motion

• destroyed, law of conservation of energy

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

All of the answer choices are examples of kinetic energy Except-

• A volleyball player spiking a ball

• A race car speeding down the highway

• A bowling ball sitting on the rack

• A bowling ball rolling down the alley

Tags

NGSS.MS-PS3-1

When stored energy begins to move the object______ energy from _______ to _________.

• energy, force, motion

• transfers, kinetic, potential

• forces, mechanical, nuclear

• transfers, potential,kinetic

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

GPE = (m)(g)(h)

g = 9.8 m/s²

• 3920000 J

• 294 J

• 180000 J

• 1225 J

Answer explanation

GPE = (100 kg)(9.8 m/s²)(4000 m)

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-2

NGSS.MS-PS2-4

Increasing an object's mass will increase its kinetic energy.

• true

• false

Tags

NGSS.MS-PS3-1

As the velocity of an object decreases its KE will...

• increase

• decrease

• stay the same

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5