How much work does a 100-kg person do against gravity in walking up a trail that
ID: 1781733 • Letter: H
Question
How much work does a 100-kg person do against gravity in walking up a trail that gains 360 m in elevation?(take g = 10 m/s^2)
A.432,000 J
B.232,00 J
C.360,000 J
D.432 J
E.720,000 J
Assume that two cars have the same mass, but that the blue car has half the speed of the red car. We then know that the blue car has ____ kinetic energy as the red car
A.none of above
B.twice as much
C.one half as much
D.four times as much
E.one fourth as much
In physics, work is defined as ___________
A.product of the force and the displacement traveled in the direction of force
B.net force perpendicular to the motion and the distance traveled
C.net force and the distance traveled.
D.net force parallel to the motion and the time it is applied
E.None of above
Explanation / Answer
A)work=change in energy<------important concept toremember
work=m*g*change in h
work=100*10*360
work=360,000j
OPTION:C
B)we then know that the blue car has four times as much kinetic energy as the red car
and the OPTION is:D
C) option is A.
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