25a,b,c plz answer all questions
Q25. (a) A force is applied on a body of mass 20 kg moving with a velocity of 40 ms–1. The body attains a velocity of 50 ms–1 in 2 seconds. Calculate the work done on the body.
[9000 J ]
(b) A girl of mass 35 kg climbs up from the first floor of a building at a height of 4 m above the ground to the third floor at a height of 12 m above the ground. What will be the increase in her potential energy? (g = 10 ms–2).
[2800 J ]
(c) (i) State the Principle of conservation of energy.
(ii) Name the form of energy which a body may possess even when it is not in motion. [2013]
Kindly ask different queries in different thread. Also, refer the link of question (a).
https://www.meritnation.com/ask-answer/question/a-force-is-applied-on-a-body-of-mass-20-kg-moving-with-a/force-work-power-and-energy/4237562
https://www.meritnation.com/ask-answer/question/a-force-is-applied-on-a-body-of-mass-20-kg-moving-with-a/force-work-power-and-energy/4237562