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The position vector of a particle change...

The position vector of a particle changes with time according to the direction `vec(r)(t)=15 t^(2)hati+(4-20 t^(2))hatj`. What is the magnitude of the acceleration at t=1?

A

40

B

25

C

100

D

50

Text Solution

Verified by Experts

The correct Answer is:
A
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