Question

Two blocks of masses $m_1=2$ kg and $m_2=4$ kg hang over a massless pulley as shown in figure. A force F0 = 100N acting at the axis of the pulley accelerates the system upward. Then

• A. Acceleration of 2kg mass is $15m/s^2$
• B. Acceleration of 4kg mass is $2.5m/s^2$
• C. Acceleration of both the masses is the same
• D. Acceleration of both the masses is upward.

Answer 1

Answer: (A), (B), (D)

The correct options are
A

Acceleration of 2kg mass is $15m/s^2$

B

Acceleration of 4kg mass is $2.5m/s^2$

D

Acceleration of both the masses is upward.

$2_{2kg}=\frac{50-20}{2}=15m/s^2\uparrow a_{4g}=\frac{50-40}{4}=2.5m/s^2\uparrow$