ENERGY AND WORK

The work done when a force of 20N makes an object move 12m in the direction of the force

• 24 J

• 1.33 J

• 240 J

• 480 J

Tags

NGSS.HS-PS3-2

When a cyclist brakes, his kinetic energy store is reduced from 2800 J to zero in a distance of 20 m. Then the braking force is

• 56,000 N

• 140 N

• 1400 N

Tags

NGSS.HS-PS3-1

When you eat fruits and vegetables, chemical bonds are releasing stored energy, this is...

• a. thermal energy

• b. sound energy

• c. electrical energy

• d. chemical energy

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Two factors that determine work are

• force

• acceleration

• mass

• distance

• velocity

Tags

NGSS.HS-PS2-1

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J

• 30 J

• 120 N

• 30 N

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

• 25J

• 100J

• 4J

• 75J

Tags

NGSS.MS-PS3-4

If the mystery machine moves 100 meters how much work is done?

• 130,000,000J

• 70,000J

• 100,000J

• 30,000J

Tags

NGSS.HS-PS3-1

At which point of this roller coaster is the energy 1/2 kinetic and 1/2 potential?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-2

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?

• 100 watts

• 400 watts

• 104 watts

• 50 watts

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A crane lifts an 8-m long steel girder weighing 2600 N up 15 m off the ground. The crane did ___ of work.

• 0 J

• 39000 J

• 20800 J

• 2600 J

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2