Question

Plz answer the question from the chapter work, power, energy

Answer 1

Answer:

option2 is the correct answer mate

hope it helps uh..

#unknowngirl04 ♥♥

Answer 2

Answer: Work done by string = Tension in string*displacement *cos(theta) where theta is the angle between Tension and displacement.

In this case, Tension is acting upwards and Displacement is downwards. Angle is 180° and cos(180°) = -1

So, Work done by Tension = -T*S

To find tension = mg-T = ma

mg-T =mg/4

T = 3mg/4

S=h

So work done by Tension = -3mgh/4

Explanation: