A cricket ball of mass 150 g has an initial velocity u =(3 i +4 j ) m / s and a final…
Physics · NEET · NTA Exams — BASIC MATHEMATICS AND VECTOR
A cricket ball of mass 150 g has an initial velocity\(\vec{u}=(3 \hat{i}+4 \hat{j}) \mathrm{m} / \mathrm{s}\) and a final velocity \(\vec{v}=-(3 \hat{i}+4 \hat{j}) \mathrm{m} / \mathrm{s}\), after being hit. The change in momentum (final momentum – initial momentum) is (in kg ms−1)
- zero.
- \(-(0.45 \hat{i}+0.6 \hat{j})\).
- \(-(0.9 \hat{i}+1.2 \hat{j})\).
- \(-5(\hat{i}+\hat{j})\).
Answer
(C) -(0.9 i +1.2 j ) .
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