If 2 joules of work is done in raising an apple 8 meters, how much force was exerted?
1 answer:
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The kinetic energy of an object is given by
where m is the mass of the object and v its velocity.
For the car in the problem,
and 
, so the kinetic energy of the car is
and as we can see, yes, the answer depends on the car's mass.
where m is the mass of the object and v its velocity.
For the car in the problem,
and as we can see, yes, the answer depends on the car's mass.