What kinetic energy should be imparted to an object of mass “m” to raise it to a height of 1000 meters? (Take g = 10 m/s^2)

Category: QuestionsWhat kinetic energy should be imparted to an object of mass “m” to raise it to a height of 1000 meters? (Take g = 10 m/s^2)
Editor">Editor Staff asked 1 year ago

What kinetic energy should be imparted to an object of mass “m” to raise it to a height of 1000 meters? (Take g = 10 m/s^2)
 
(a) 10m J
 
(b) 100m J
 
(c) 1000m J
 
(d) 10000m J
 
This question was addressed to me in final exam.
 
This intriguing question originated from Kinetic Energy in division Work, Energy and Power of Physics – Class 11
Select the correct answer from above options 
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1 Answers
Editor">Editor Staff answered 1 year ago

The correct option is (d) 10000m J
 
For explanation I would say: Mass of object = m
 
From the conservation of energy;
 
1/2 x m x v^2 = m x g x h
 
 = m x 10 x 1000
 
 = 10000m J


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