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A particle has an initial velocity of 3h...

A particle has an initial velocity of `3hat(i) + 4 hat(j)` and an acceleration of `0.4 hat(i) + 0.3 hat(j)`. Its speed after `10s ` is :

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`vecv=vecu+vec(a)t`
`=(3hati+4hatj)+(0.4hati+0.3hatj)10`
`=3hati+4hatj+4hatj+3hatj=7hatj+7hatj`
`|vecv|=sqrt(49+49)=7sqrt(2)`
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