babygirl091502
11.12.2019 •
Physics
Acyclist pedals his bike and reaches the top of a hill. then he begins to coast downhill without pedaling. when he reaches the bottom of the hill, he again applies force to the pedals. explain why the cyclist accelerates as he coasts downhill. (25 points)
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Ответ:
1.98s
Explanation:
The time taken to hit the ground is given by
h=ut+ 1/2 at^2
but u =0
so we have
h=1/2at^2
making t the subject
t=√2h/g
√2×19.6/10
1.98s