Work

What are the two factors that determine work?

• amount of the force, and effort used

• amount of the force, and type of force

• mass, and distance

• amount of force and distance moved

Which situation is work not done?

• lifting a 20 pound box off the floor
• holding a 20 pound box above the floor
• sliding a 20 pound box across the floor
• sliding a 20 pound box up an inclined plane

Which one is the equivalent of 1 Joule?

• 1 newton.meter

• 1 kg.m/sec

• 1 kg.m/sec²

• 1000 kg.m/sec

If a force of 100 newtons was exerted on an object and no work was done, the object must have —

• accelerated rapidly

• remained motionless

• decreased its velocity

• gained momentum

True or false

You do work when you mannequin pose with an object in your hand.

• true

• false

The farther you move an object, the more work you do.

• True

• False

How much work is performed when a 50 kg crate is pushed 15 m with a force of 20 N?

• 300 joules

• 750 joules

• 1,000 joules

• 15,000 joules

I do 132 Joules of work on a bookcase. If I apply a force of 6 Newtons, how far have I moved the bookcase?

• 810 meters
• 792 meters
• 22 meters
• 320 meters

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

Tags

NGSS.MS-PS2-2

If you lift a box from the floor to a height of 1m and then carry the for for 10m, you do work only when you CARRY the box.

• True
• False