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Which of the following is a compound machine ?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
A weightlifer presses a 400 N weight 0.5 m over his head in 2 seconds. What is the power of the weightlifter?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the biy do on the car?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
What are the units of work ?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
What is the mechanical advantage of a single fixed pulley ?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
What are the units for power?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
An incline plane
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
What is the gravitational potential energy of a 50 kg box that is 8.0 m above the ground ?
all of the above
all of the above
4000J
1
a pair of pliers
zero
100 watts
change both the magnitude and the direction of the force.
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