Question

Three blocks of mass 1 kg, 4 kg and 2 kg are placed on a smooth horizontal plane as shown in figure. Find the acceleration of the system.

• A. $2m/s^2$
• B. $10m/s^2$
• C. $12m/s^2$
• D. $0m/s^2$

Answer 1

The correct option is B $10m/s^2$

Net force $=(120-50)N$ $=70N$

Acceleration $=\frac{NetForce}{ToitalMass}=\frac{70}{7}=10m/s^2$