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A 150 g mass has a velocity vec(v)=(2hat...

A 150 g mass has a velocity `vec(v)=(2hat(i)+6hat(j))m//s` at a certain instant. What is its kinetic energy?

Text Solution

Verified by Experts

We know that , `k=1/2 mv^(2)`
or, `K=1/2 m ( vec(v).vec(v)) " " [ :. vec(v).vec(v)=v^(2)]`
`=1/2 xx (0.150 kg)(2^(2)+6^(2))=3.0J`
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