A light string passes over a frictionless pulley. To one of its ends a mass of 10 kg is attached to its other end a mass of 15 kg is attached. The tension in the thread will be

Question

A light string passes over a frictionless pulley. To one of its ends a mass of 10 kg is attached to its other end a mass of 15 kg is attached. The tension in the thread will be (A) 117.6 N (B) 118 N (C) 120 N (D) None

Tardigrade Admin · Accepted Answer

T =((2 m 1 m 2/ m 1+ m 2)) g =(2 × 10 × 15 × 9.8/25) T =(2 × 2 × 15 × 9.8/5)=117.6 N

Q. A light string passes over a frictionless pulley. To one of its ends a mass of $10 k g$ is attached to its other end a mass of $15 k g$ is attached. The tension in the thread will be

$117.6 N$

$118 N$

$120 N$

None

$T = (\frac{2 m _{1} m _{2}}{m _{1} + m _{2}}) g$
$= \frac{2 \times 10 \times 15 \times 9.8}{25}$
$T = \frac{2 \times 2 \times 15 \times 9.8}{5} = 117.6 N$

Q. A light string passes over a frictionless pulley. To one of its ends a mass of 10kg is attached to its other end a mass of 15kg is attached. The tension in the thread will be

117.6N

118N

120N