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A particle has an initial velocity of 4 ...

A particle has an initial velocity of `4 hati +3 hatj` and an acceleration of `0.4 hati + 0.3 hatj`. Its speed after 10s is

A

10 units

B

7 units

C

`7 sqrt(2)` units

D

8.5 units

Text Solution

Verified by Experts

The correct Answer is:
A
`v = u + at = (4hati +3hatj) +(0.4 hati + 0.3hatj) (10) = (8hati +6hatj)`
`:. v = sqrt((8)^(2) +(6)^(2)) = 10` units
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