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Position vector of a particle moving in ...

Position vector of a particle moving in space is given by :
`vec(r)=3sin t hat i+3 cos t hatj+4 t hatk`
Distance travelled by the particle in `2s` is :

A

5 m

B

10 m

C

20 m

D

50 m

Text Solution

Verified by Experts

The correct Answer is:
B
`vec(v) = 3 cos t hat (i)+3 sin t hat(j)+4hat(k)`
`|vec(v)|=sqrt(3^(2)+4^(2))=5`
Distance `=10 m`
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