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A particle has initial velocity (3hati+4...

A particle has initial velocity `(3hati+4hatj)` and has acceleration `(0.4hati+0.3hatj)`. Its speed after 10s is :-

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Velcocity of particle after `10s vecv=(6hati+8hatj)+10(3hati+4hatj)=36hati+48hatj`
speed `=sqrt((36)^(2)+(48)^(2))=+sqrt(6^(2)+8^(2))=60ms^(-1)`
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