A man of mass 85 kg runs up a flight of stairs of height 4.6 m in a time period
1 answer:
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At the player's maximum height, their velocity is 0. Recall that
which tells us the player's initial velocity is
The player's height at time is given by
so we find their airtime to be
Answer:
a)
b)
c)
Explanation:
the gravitational potential energy is given by:
The kinetic energy is given by:
the initial kinetic energy is zero because the motion started from rest, so:
applying the conservation of energy theorem:
The work done by the friction force is given by:
the angle of the force is 180 degrees because it's against the movement: