Laws Of Motion Question 338

Question: A block of mass m = 2 kg is placed on a plank of mass M=10kg which is placed on a smooth horizontal plane. The coefficient of friction between the block and the plank isμ=13 . If a horizontal force F is applied on the plank, then find the maximum value of F for which the block and the plank move together. (Take g=10m/s2 )

Options:

A) 30 N

B) 40 N

C) 120 N

D) None of the above

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For no slipping between m and At, F(M+w)g/3

F40N For no toppling of m block F(M+m)g/4

F30N

Fmin=30N



NCERT Chapter Video Solution

Dual Pane