Laws Of Motion Question 114

Question: On the horizontal surface of a truck (m = 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 [CBSE PMT 2001]

Options:

A) 5 N

B) 6 N

C) 5.88 N

D) 8 N

Show Answer

Answer:

Correct Answer: A

Solution:

$ F _{l}=\mu mg=0.6\times 1\times 9.8=5.88\ N $

Pseudo force on the block = $ ma=1\times 5=5\ N $

Pseudo is less then limiting friction hence static force of friction = 5 N.



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