Work, Power and Energy

Suppose a cart has a kinetic energy of 0.5 J. If you add enough mass to double the mass and make the cart go three times as fast, its kinetic energy is now ---.

• 6 J

• 3 J

• 18 J

• 9 J

The ability to do work or cause change:

• work

• energy

• momentum

• power

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-3

NGSS.HS-PS3-5

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

• 18 m

• 4 m

• 10 m

• 6 m

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

How do you calculate power?

• P = W/t
• P = E/t
• P = w * t
• P = bbq/chicken

When you release a stretched rubber band, the rubber band has ________ energy. 

• kinetic 
• potential
• none of the above
• all of the above 

Tags

NGSS.MS-PS3-2

What is the correct formula to use if calculating the amount of work done ?

• Work = distance / time

• Work = mass x velocity

• Work = force x distance

• Work = force / time

The SI unit of energy is _________________?

• Newton metre (Nm)
• Newton per metre  (N/m)
• Joule (J)
• Joule per metre (J/m)   

The SI unit of energy is _________________?

• Newton metre (Nm)
• Newton per metre  (N/m)
• Joule (J)
• Joule per metre (J/m)   

A boy exerts an average force of 68N when he lifts a box 1.1m. How much work does he do?

• 74.8J

• 733.79J

• 61.82J

• 7.62J

A boy pushes on a parked car with a force of 195N. The car does not move. How much work does the boy do?

• 19.88J

• 1912.95J

• 195J

• 0J