# Work And Power: Question Preview (ID: 8178)

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**How much work is done when a very large force is applied to an object but does not move the object?**

a) none

b) The exact amount of work and weight of the object must be known to figure this out.

c) a little

d) a lot

**Which of these is the unit of measure for work?**

a) watts

b) newtons

c) pounds

d) joules

**What is the correct formula for work?**

a) Work= force/time

b) Work= force/distance

c) Work= mass * acceleration

d) Work= force * distance

**Which of the following is NOT an example of work?**

a) a windmill turning in the wind

b) a person sliding on a box across the floor

c) a metal bar bracing a leaning brick wall

d) an air bag deploying in an automobile wreck

**What is the work done on a 34-N weight if it's lifted up 1 km?**

a) 17J

b) 34J

c) 0.034J

d) 34,000J

**A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters?**

a) 0.5J

b) 19.6J

c) 1.225J

d) 192.08J

**A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the force to pull the plow 100 meters in 5 minutes?**

a) 10,000 J

b) 10,000 N

c) 250,000 N

d) 3,000,000 J

**What is the unit of measurement for power?**

a) m/s2

b) watts

c) joules

d) newtons

**What is the correct formula for power?**

a) Power=work/time

b) Power= work*time

c) Power=force*distance

d) Power=work*distance

a) 30 W

b) 100 W

c) 300 W

d) 900 W

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