A penny is dropped from atop of a 512-m tall building by a physicist. Determine the magnitude of the velocity of the penny BEFORE it hits the ground.
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Ответ:
F = 120 N
Explanation:
Given that,
The mass of a runner, m = 60 kg
Acceleration of the runner, a = 2 m/s²
We need to find the force provided from her legs. The formula for force is given by :
F = ma
Substitute all the values,
F = 60 kg × 2 m/s²
= 120 N
So, the required force is equal to 120 N.