A force of 10 N changes the velocity of a body from 5 msal to 10 ms' in
10 seconds. How much force is required to bring about the same change in
5 seconds.
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Answer:
a = v-u /t
= 10 m/s - 5 m/s / 10s
= 0.5 m/s²
F = ma
10 N = 0.5 m/s².m
m = 10 kg.m/s² / 0.5 m/s²
= 20 kg
force is required to bring about the same change in 5 seconds
F = ma
= m × [v-u/t]
= 20 kg × [ 10 m/s - 5m/s / 5s ]
= 20 kg × 1 m/s²
= 20 N
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