A porter was carrying a load on his head. according to science , is the porter doing any work? If so then give reason if not then also give reason behind it.
Answers
Answer:
Work done by any force is given by dot product of force and displacement of the particle.
So W=F.S
Where F,S are vector quantities and W is scaler quantity.
SI Unit of work done is N.m and also called Joule(J).
So work done in above case is W=FSCosθ, here θ=90
∘
Because person moves horizontal and force of gravity is vertical.
So work done is Zero.
Hence above statement is true
Explanation:
hope this helps u fellow army
Answer:
The Physical work done by porter will be equal to the amount of energy spend by him in overall activity. He is climbing up the stairs so work is being done against the gravitational pull so The work done by him will be equal to the increase in potential energy of him together with the load.
Suppose porter mass be M and mass of load he is carring be m ---and he climbs stairs at height h. So the increase in potential energy will be (M+m)*g*h .
Point to Note : Work done by porter is being stored in the form of Potential Energy gain.
Explanation:
hope it helps :)