Energy Calculations

If the marble had a mass of 0.3kg and the hill was 2.3 m tall, how much potential energy did it have at the top of the ramp?

• 2.3

• .23

• 6.9

• 5.2

Tags

NGSS.MS-PS3-2

What is the correct unit for energy?

• meters (m)

• kilogram meters per second (kg m/s)

• Newtons (N)

• Joules (J)

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have?

• 5.4 J

• 1.8 J

• 3 J

• 6 J

Tags

NGSS.MS-PS3-1

If the marble had 6.9 J of (potential) energy at the top of the hill and 5.4 J of (kinetic) energy at the bottom of the hill, was energy conserved and why?

• Yes because the total energy stayed the same

• Yes because the total energy changed

• No because the total energy stayed the same

• No because the total energy changed

Tags

NGSS.MS-PS3-5

If the 1.2 kg basketball rolls at 3 m/s, what is it's kinetic energy?

• 2.7

• 5.4

• 3.6

• 9

Tags

NGSS.MS-PS3-1

The marble had 5.4 J of kinetic energy and then hit the stationary basketball. The basketball started rolling and the marble stopped rolling. The rolling basketball now has 5.4 J of kinetic energy. Was energy conserved and why?

• Yes because the total energy stayed the same

• Yes because the total energy changed

• No because the total energy stayed the same

• No because the total energy changed

Tags

NGSS.MS-PS3-5

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

• 8.5 J

• 45 J

• 7.5 J

• 22.5 J

Tags

NGSS.MS-PS3-1

A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity of the body?

• 10 m/s

• 15 m/s

• 20 m/s

• 40 m/s

Tags

NGSS.MS-PS3-1

A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?

• 71 kg

• 22.72 kg

• 142 kg

• 2.32 kg

Tags

NGSS.MS-PS3-2

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

• 12,789 Joules

• 24,500 Joules

• 4,500 Joules

Tags

NGSS.MS-PS3-2