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A constant force of 100 N acts on the bo...

A constant force of 100 N acts on the body for 8 s for changing its momentum. The change of momentum of the body is ______ newton second.

A

400

B

800

C

200

D

100

Text Solution

Verified by Experts

The correct Answer is:
B
By Newton.s `2^(nd)` law
`F = (m(v-u))/(t)`
`implies mv-mu= F xx t`
Substituting F = 100 N
t = 8 s
`mv - mu = 100 xx 8 = 800` N s
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