Laws Of Motion Question 107
Question: A block of mass 50 kg can slide on a rough horizontal surface. The coefficient of friction between the block and the surface is 0.6. The least force of pull acting at an angle of 30° to the upward drawn vertical which causes the block to just slide is [ISM Dhanbad 1994]
Options:
A) 29.43 N
B) 219.6 N
C) 21.96 N
D) 294.3 N
Show Answer
Answer:
Correct Answer: D
Solution:
For limiting condition $ f=\mu R $
$ F\sin 30{}^\circ =\mu (mg-F\cos 30{}^\circ ) $ , By solving $ F=294.3\ N $
