First slide

Connected bodies

Question

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end as shown in fig.
The acceleration of the system is (g = 10 m/s²)

Moderate

A

100 m/s²
B

3 m/s²
C

10 m/s²
D

30 m/s²

Solution

The acceleration of the system is given by
$a = \frac{M_{2} g}{M_{1} + M_{2}} = \frac{3 \times 10}{7 + 3} = 3 m / s^{2}$ .

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