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 ${30}^o$ to the upward drawn vertical which causes the block to just slide is

• A. 29.43 N
• B. 219.6 N
• C. 21.96 N
• D. 294.3 N

Answer 1

The correct option is D

294.3 N

For limiting condition $f=\mu R$
$Fsin{30}^o=\mu (mg-Fcos{30}^o)$, By solving F=294.3N