A force of 80 N acting on a certain mass
for 3.0 s gives it a velocity of 6.0 m/s. Find
the mass of the body if the body was initially
at rest.
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Answer:
mass of the body = 80/3 kg
Explanation:
F= 80N or 80kgm/s^2
from 1st equation of motion:
v=u+at
a=v-u/t
a=(6m/s-0m/s)/2s
a=3m/s^2
F=Ma
where M = mass of the body
and F = force
F=Ma
80N=M*3m/s^2 or 80kgm/s^2=M*3m/s^2
M=80/3 kg <= mass of the body at rest
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