A) \[{{60}^{o}}\]
B) \[{{45}^{o}}\]
C) \[{{30}^{o}}\]
D) \[{{15}^{o}}\]
Correct Answer: C
Solution :
Minimum force required to move a body up a rough inclined plane, \[{{F}_{1}}=mg(\sin \theta f\,+\mu \,\cos \theta )\] Minimum force required to prevent the body from sliding down the rough 'inclined plane \[{{F}_{2}}=\mu mg\,\cos \theta \] According to question \[{{F}_{1}}=3{{F}_{2}}\]we get \[\theta ={{30}^{0}}\]You need to login to perform this action.
You will be redirected in
3 sec