Work And Power Question Preview (ID: 12758)


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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) a lot
c) a little
d) The exact amount of work and the weight of the object to figure this out.

Which of these is the unit of measure for work?
a) watts
b) joules
c) pounds
d) newtons

What is the correct formula for work?
a) Work= force/time
b) Work= force * distance
c) Work= force/distance
d) Work=mass * acceleration

Which of the following in NOT an example of work?
a) a windmill turning in the wind
b) a person sliding a box across the floor
c) a metal bar bracing a learning brick wall
d) an air bag deploying in an automobile wreck

What is the work done on a 34-N weight if it is lifted up 1 km?
a) 17 J
b) 34 J
c) 0.034 J
d) 34,000 J

A sailboat weighing 1,960 N moves at 3m/s for 10 minutes. What is the value for the work of the sails?
a) 19,600 J
b) 58,800 J
c) 1,176,000 J
d) 3,528,000 J

What are the units for power, work, and force?
a) Power is measured in watts, work is measured in newtons, and force is measured in joules.
b) Power is measured in newtons, work is measured in watts, and force is measured in joules.
c) Power is measured in watts, work is measured in joules, and force is measured in newtons.
d) Power is measured in joules, work is measured in newtons, and force is measured in m/sec2.

What units define a watt?
a) joules/meter
b) newtons/meter
c) joules/second
d) newtons/seconds2

What is the correct formula for power?
a) Power= work/time
b) Power=work*time
c) Power=force*distance
d) Power=work*distance

Power is measured in watts, work is measured in joules, and force is measured in
a) Newtons
b) Watts
c) M/s
d) None of the above

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