Work

If a person lifts a 20 kg object vertically upwards by 2 meters, how much work is done against gravity? (Assume g = 9.8 m/s²)

• 392 J

• 196 J

• 40 J

• 20 J

Tags

NGSS.MS-PS3-4

What is the work done by a force of 10 N moving an object 3 meters in the direction of the force?

• 30 J

• 10 J

• 3 J

• 0 J

Tags

NGSS.HS-PS3-1

A force acts on an object but the object does not move. How much work is done by the force?

• Equal to the force

• Equal to the mass of the object

• Cannot be determined

• 0 J

A car applies a force of 600 N to move a distance of 200 meters. How much work is done by the car?

• 120,000 J

• 300 J

• 1,200 J

• 3,000 J

Tags

NGSS.HS-PS3-1

A crane lifts a 500 kg load to a height of 10 meters. How much work is done by the crane? (Assume g = 9.8 m/s²)

• 49,000 J

• 5,000 J

• 9,800 J

• 50,000 J

Tags

NGSS.HS-PS2-4

What is the work done by gravity when a ball is dropped from a height of 20 meters and hits the ground? (Assume the mass of the ball is 2 kg and g = 9.8 m/s²)

• 196 J

• 392 J

• 0 J

• 20 J

Which are correct units for work?

• N x s

• N x m

• J/s

• W

In order for Work to happen, what 2 things must occur?

• Mass and Displacement
• Force and Mass
• Force and Work
• Force and displacement

What is the unit of measurement for work?

• meters

• newtons

• m/s

• Joules

What are two different units that represent work?

• Watt and calorie

• Joule and Newton-meter

• Newton-meter and watt

• Pascal and ohm

Answer explanation

Joule and Newton-meter are two units that represent work. They are the correct choices because they are both derived from fundamental units of mass, length, and time.