Power and work

What does one newton exerted over a distance of one meter equal?

• One watt
• One hertz
• One volt 
• One joule 

A weightlifter lifts a 300 newton weight 2 meters off the ground. How much work has he done?

• 600 J

• 660 J

• 300 J

• 1200 J

Tags

NGSS.HS-PS3-1

Which of these is a measure of force?

• 100 newtons
• 100 meters per second
• 100 joules
• 100 watts

Tags

NGSS.HS-PS2-1

You do 90 joules of work in 30 seconds. How much power have you generated?

• 30 watts
• 3 watts
• 120 watts
• 270 watts

Which of the following would produce the most power?

• A mass of 10 kilograms lifted 10 meters in 10 seconds 
• A mass of 10 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 5 meters in 10 seconds

Tags

NGSS.MS-PS3-5

Work divided by time equals...

• energy
• power

The unit of work is the ...

• joule
• force

The unit of power is the...

• work
• watt

Force multiplied by distance equals...

• work
• power

Work is done on an object when the object moves in the SAME direction in which the force is applied.

• True
• False