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Q.

On the horizontal surface of a truck (μ = 0.6), a block of mass 1 kg is placed.  If the truck is accelerating at the rate of 5m/sec2 then frictional force on the block will be

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a

5 N

b

6 N

c

5.88 N

d

8 N

answer is A.

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Detailed Solution

F1=μmg=0.6 x 1 x 9.8 = 5. 88 N

Pseudo force on the block =  ma = 1 x 5 =5 N
Pseudo is less then limiting friction hence static force of friction = 5 N
 

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