Answer:
129.96
At a Gravitational acceleration of 32.17405 ( which is the normal rate for a freefall) you will geta velocity of 129.96 and the time of fall will be 4.039 seconds from 80 meters.
Why is the weight of a free falling body zero? It is not, an object in free fall will still have a weight, governed by the equation W = mg, where W is the object's weight, m is the object's mass, and g is acceleration due to gravity. Weight, however, has no effect on an objects free falling speed, two identically shaped objects weighing a different amount will hit the ground at the same time.
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When scientific work can be duplicated it is proves a hypothesis is reliable.
For the record, in science, hypotheses can never be proven correct, and they always require evaluation. Even if a hypothesis still holds after being tested many times, it will always remain open to question.
It depends on two factors height and mass
Explanation:
It is known that the relation between power and work is as follows.
Power = 
As it is given that power is 370 watts and time is 40 minutes. First, we will convert minutes into seconds as follows.
= 2400 sec
Now, total power or energy is calculated as follows.
Power =
= 
= 888000 J
As 1 kJ = 1000 J. So, convert 888000 J into kJ as follows.
= 888 kJ
therefore, we can conclude that total energy expended by the cyclist is 888 kJ.
