Question

block of mass 8 kg acted by a force of 56 newton exerted by string in vertically upward position, system starts from rest, work done by tension in 10sec​

Answer 1

Given:-

mass, m=8 kg

Tension in the wire, T=56 N

To Find:-

work done by tension

Explanation:-

Expression of work done by force F is given by:-

$W=F\times scos\theta \text{ where,}\\\\s=\text{distance travelled by the object}\\\theta=\text{angle between force and distance direction}\\\\\text{ATQ, tension is in vertical direction and distance is in horizontal direction }\Rightarrow\theta=90^{0}\\\\\Rightarrow W=F\times scos90^{0}=0J$