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In physics, work is defined as______________.
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
Suppose you put in 100 J of work on a lever and get out 93 J of work. How much of the work input is lost as heat?
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
Torque _____.
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
If you apply 25 N of force on a box over 10 meters, how much work did you do on the box?
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
A boulder at the top of a vertical cliff has a potential energy of 100 MJ relative to the ground below. It rolls off the cliff. When it is halfway to the ground its kinetic energy
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
How much farther will a car traveling at 100 km/s skid than the same car traveling at 50 km/s?
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
Which description would produce the greatest torque?
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
A meter stick is suspended at its midpoint and two blocks are attached. A 10-N block is attached 20 cm to the left of the midpoint. Where must a 40-N block be placed to balance?
force times distance
the same as its potential energy at that point
large force, long lever arm
5 cm to the right of the midpoint
250 J
7%
four times as far
All of these statements are true.
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