Question

A man weighing 500N carried a load of 100N up a flight of stairs 4 meters high in 5 sec. What is the power? And why we have to multiply 500+100N ×4metres

Answer 1

Explanation:

WORK DONE=FORCE ×DISPLACEMENT

here force is of gravity which is 500n+100n =600n

and displacement is 4 meters

W.D=600× 4

= 2400 J

WE HAVE MULTIPLIED IT BY 4 AS DISPLACEMENT OF FORCE VECTOR IS 4 METRE