Work and Power

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

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

• True
• False

The more POWER you use to move an object, the more work you do. 

• True
• False

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

A strongman exerts 1500 N on the side of a building. After 2 minutes, the building doesn't move. How much work did he do?

• 180,000 J

• 0 J

• 750 J

• 1500 J

You use 950 J of energy to push a sofa. If it took you 5 sec to move the sofa, what was your power?

• 190 J

• 4750 J

• 4750 W

• 190 W