Work Energy Theorem

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

• 50 J

• 60 J

• 20 J

• 45 J

Tags

NGSS.HS-PS3-1

Calculate the force necessary to move a 1.00 x 10³ kg car from rest to 25 m/s in 130 m.

• 1.3x 10⁶ N

• 25,0000 N

• 2400 N

• 3.2 x 10⁶ N

A 12 kg book is pushed from rest to a final velocity of 10 m/s. The book travels 6 m. How much force was the book pushed with?

• 600 N

• 100 N

• 200 N

• 1200 N

A runner begins at a speed of 2 m/s. By the middle of the race, the runner is at a speed of 6 m/s. The runner has a mass of 60 kg. How much work was done?

• 1200 J

• 1200 N

• 960 J

• 960 N

Tags

NGSS.HS-PS3-1

A 70 kg gymnast somersaults onto a mat at a speed of 10 m/s. When she is finished with the flip, she is moving at 4 m/s. How much work was done during the flip?

• 2,940 J

• -2,940 J

• 2,940 N

• -2,940 N

Tags

NGSS.HS-PS3-1

A car that has a mass of 500 kg is moving at 20 m/s. There is a total of 30,00 J of work done on the car, what is the final velocity of the car?

• 17 m/s

• 50 m/s

• 23 m/s

• 25 m/s

Tags

NGSS.HS-PS3-1

A 5 kg box is pushed with a force of 10 N and a starting speed of 3 m/s. The box reaches a speed of 6 m/s. How far was the box pushed?

• 6.75 m

• 11.25 m

• 8.50 m

• 12.75 m

Tags

NGSS.HS-PS2-1

A major league pitcher can throw a baseball with a kinetic energy of 150 J. How much work must the pitcher do to the ball to give it that much KE?

• 50 J

• 0

• 150 J

• 300 J

Calculate the Kinetic Energy (KE) of a girl whose mass is 50 kg who is moving at 4 m/s.

• 200 J
• 800 J
• 400 J
• 100 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the work done when a 20-N force pushes a cart 3.5 m?

• 70J
• 6.8J
• 23.5J
• 17.5J