A 60. kg student jumps from the 10. meter platform at ASU's swimming complex into the pool below.   a.    Determine her Eg at the top of the platform.

b.    How much Ek does she possess at impact?
What is her velocity at impact?

c.    Repeat steps a and b for a 75 kg diver.

d.    If she jumped from a platform that was twice as high, how many times greater would be her velocity at impact (compare to 60 kg woman)?

e.    How much higher would the platform have to be in order for her velocity to be twice as great (compare to 60 kg woman at 10.m height)?

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.