A man whose mass is 70 kg climbs from a hill station A to another hill station B.The height of hill station A 1200m above the sea level and that of B 1800m above the sea level . Calculate the work done in going from A to B.(g=10m/s)
Answers
Answered by
69
Given,
mass=70 kg
height of hill station A=1200 m
height of hill station B=1800m
work done in case A=mgh
=70*10*1200
=840000 J(joule)
work done in case B=mgh
=70*10*1800
=1260000 J(joule)
Therefore,work done in going A to B
=1260000-840000
=420000 J(joule)
Answered by
29
Gravitational force = mg
= 70 × 10 = 700 N. ( acting downwards )
Displacement = final position - initial position
= 1800 - 1200
= 600 m ( in the upward direction )
As the angle between force and displacement in opposite Work done is negative.
Work done = - 700 × 600
= -420000 J
= -420kJ
Hope it may help you !!!!!
Pls mark as brainlest !!!!
= 70 × 10 = 700 N. ( acting downwards )
Displacement = final position - initial position
= 1800 - 1200
= 600 m ( in the upward direction )
As the angle between force and displacement in opposite Work done is negative.
Work done = - 700 × 600
= -420000 J
= -420kJ
Hope it may help you !!!!!
Pls mark as brainlest !!!!
Similar questions