Two masses `M_(1) " and " M_(2)` are attached to the ends of a string which passes over a pulley attached to the top of an inclined plane. The angle of inclination of the plane is `30^(@)` and `M_(1)=10 kg, M_(2)=5kg`. What is the acceleration of mass `M_(2)` ?

Options

A. `10 ms^(-2)`
B. `5 ms^(-2)`
C. zero
D. none of these

Answer

C

Explanation

( c) Since `M_(1)g sin 30^(@)=M_(2)g`
`therefore` Net pulling force=0
or acceleration of system =0