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Friction General Understanding

A 3 kg block ...

Question

A $3 kg$ block is resting on rough horizontal surface of a truck moving with acceleration of $2 {m/s}^{2}$ on a horizontal road. The force of friction on the block is

A

Zero

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B

6

N

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C

4

N

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D

8

N

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Solution

The correct option is B $6$ N
Answer (3)
From the frame of truck

$f_{s} = F_{P} = m a$
$= 6 N$

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