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A particle leaves the origin with an ini...

A particle leaves the origin with an initial velocity `vecv=3hati` m/s and a constant acceleration `veca=(-hati-0.5hatj) m//s^(2)` in free space. Its velocity `vecv` and position vector `vecr` when it reaches its maximum x-coordinate are

A

`vecv=-2vecj`

B

`vecv=1.5vecj`

C

`vecr=(4.5veci-2.25vecj)`

D

`vecr=(3hati-2hatj)`

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  • A particle has an initial velocity (6hati+8hatj) ms^(-1) and an acceleration of (0.8hati+0.6hatj)ms^(-2) . Its speed after 10s is

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