Question

Three masses $M =100 \,kg , m _1=10\, kg$ and $m _2=20 \,kg$ are arranged in a system as shown in figure All the surfaces are frictionless and strings are inextensible and weightless The pulleys are also weightless and frictionless A force $F$ is applied on the system so that the mass $m _2$ moves upward with an acceleration of $2\, ms ^{-2}$ The value of $F$ is : (Take $\text g=10\;ms^-2$)

• A. 3360 N
• B. 3380 N
• C. 3120 N
• D. 3240 N

Answer 1

Answer: (A)

3360 N

Answer 2

The value of F is 3360 N.
Therefore, the correct option is (A): 3360 N