A block of mass 7 kg is placed on a smooth table. An unstretchable thread tied to it passes over a frictionless pulley and carries another mass of 3 kg at other end. The acceleration of the system is

Question

A block of mass 7 kg is placed on a smooth table. An unstretchable thread tied to it passes over a frictionless pulley and carries another mass of 3 kg at other end. The acceleration of the system is (A) 100 ms-2 (B) 3 ms-2 (C) 10 ms-2 (D) 30 ms-2

Tardigrade Admin · Accepted Answer

Here, Acceleration, a = (m2/(m1 + m2)) g = (3 × 10/(7 + 3)) = 3 ms-2

Q. A block of mass 7 kg is placed on a smooth table. An unstretchable thread tied to it passes over a frictionless pulley and carries another mass of 3 kg at other end. The acceleration of the system is

$100 m s^{- 2}$

$3 m s^{- 2}$

$10 m s^{- 2}$

$30 m s^{- 2}$

Here, Acceleration, $a = \frac{m _{2}}{( m _{1} + m _{2} )} g = \frac{3 \times 10}{( 7 + 3 )} = 3 m s^{- 2}$

Q. A block of mass 7 kg is placed on a smooth table. An unstretchable thread tied to it passes over a frictionless pulley and carries another mass of 3 kg at other end. The acceleration of the system is

100ms−2

3ms−2

10ms−2

30ms−2

Here, Acceleration, a=(m1​+m2​)m2​​g=(7+3)3×10​=3ms−2

$100 m s^{- 2}$

$3 m s^{- 2}$

$10 m s^{- 2}$

$30 m s^{- 2}$

Here, Acceleration, $a = \frac{m _{2}}{( m _{1} + m _{2} )} g = \frac{3 \times 10}{( 7 + 3 )} = 3 m s^{- 2}$