please whose rank is ace and genius please answer this
A 55 kg car accelerates from 4.2 m/s to 7.8 m/s in 15 s by applying a constant force. What change in momentum occurs? How large of a force is exerted
A 55 kg car accelerates from 4.2 m/s to 7.8 m/s in 15 s by applying a constant force. What change in momentum occurs? How large of a force is exerted
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Answer:
mass = 55 kg
u = 4.2 m/s
v = 7.8m/s
time = 15 sec
a = v - u / t
= 7.8 - 4.2 / 15
= 3.6/15
= 1.2/5
=12/50
=6/25
= 0.24 m / s2
momentum = ma
= 55 × 0.24
=13.2 kg m / s 2