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 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) 30 W b) 100 W c) 300 W d) 900 W
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