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Question
Multiple Choice Question. Select the correct option.
A force acts on a body of mass 3 kg such that its velocity changes from 4 ms−1 to 10 ms−1. The change in momentum of the body is
Options
42 kgms−1
2 kgms−1
18 kgms−1
14 kgms−1
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Solution
18 kgms−1
Explanation:
Mass = m = 3 kg
Velocity v1 = 4 ms−1
Velocity = v2 = 10 ms−1
Change in momentum of body
= mv2 – mv1 = m (v2 – v1) = 3 (10 – 4)
= 3 × 6 =18 kgms−1
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