Work Energy Practice

How do you calculate power?

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

How do we calculate work?

• W = F * d
• w = f * D
• W = F * D
• w = f * d

The SI unit of work is?

• Joules
• Watts
• Newtons
• meters

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Energy can be transformed from one form into another, but the total amount of energy never changes.

• Work-energy theorem

• Law of conservation of energy

• Newton's second law of motion

• King's theorem of energy

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?

• 56, 250 watts
• 250 watts

Work is equal to the change in _______

• Kinetic Energy

• Potential Energy

• Total Mechanical Energy

• Power

Tags

NGSS.HS-PS2-1

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

NGSS.HS-PS3-2

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

How much work does it take to get a 300 kg roller coaster car to go from 0 m/s to 70 m/s?

• 73,500 J

• 73,500 N

• 0 J

• 0 N

Tags

NGSS.HS-PS3-1

A spring with spring constant 16 N/m is compressed by 0.5 m. How much energy is stored in the spring?

• 1 J

• 0.25 J

• 2 J

• 16 J

Tags

NGSS.HS-PS3-1