A force of 200 dyne acts on a body of mass 10 g for 5 s. what will be the final velocity of the body if it starts from rest?
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A force of 200 dyne acts on a body of mass 10 g for 5 s. what will be the final velocity of the body if it starts from rest?
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Explanation:
data
initial velocity = o m/s
mass = 10 g = 10 × 10^-3 kg
force = 200 dyne = 200× 10^-4 kg
time = 5 second
find final velocity = ?
solution
as
F = ma
a = F/m
a = 200 × 10^-4 /10 × 10^-3
a = 2.0 m/s
now
final velocity = initial velocity + at
vf. = vi + at
= 0 + 2 × 5
vf = 10 m/s