Daniel

Physics

29 February, 03:55

2. If you exert a force of 10.0 N to lift a box a distance of 0.9 m, how much work have you done?

0.1 J

9.0 J

10.9 J

90.0 J

3. The power of a machine measures

its rate of doing work.

its strength.

the force it produces.

the work it does.

4. If you exert a force of 700 N to walk 6 m up a flight of stairs in 6 s, how much power do you use?

19 W

25,200 W

700 W

4,200 W

5. A 750-W motor might also be rated as a

0.5-horsepower motor.

1-horsepower motor.

2-horsepower motor.

10-horsepower motor.