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A block of mass 10 kg is put gently on a...

A block of mass 10 kg is put gently on a belt-conveyor system of infinite length at t = 0, which is moving with constant speed `20 m//sec` towards right at all time.

A constant force of magnitude 15 N is applied on the block continuously during its motion.
The magnitude of acceleration of the block of mass 10 kg at t = 6s is

A

`4 m//s^(2)`

B

`3 m//s^(2)`

C

`2 m//s`

D

None of these

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The correct Answer is:
D
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