A coolie of 40 kg weight carries 20 kg salt and climbs up 20 steps of 20
centimeters each in 2 minutes. Calculate the work done by him and his power.
[g= 10 m/s^2]
Answers
Answered by
2
Answer:
it can we solve by understanding this question
Explanation:
(i) Gravitational force acting on the girl = Her mass in kg x g
= 40 x 10 = 400 N
(ii) Total gravitational force = (Mass of girl + load) x g.
= (40 + 20) x 10 = 600 N.
and Distance or height = 80 x 25/100 = 20 m.
∴ Work done by her = 600 N x distance
∴ Total work done = 60 N x 20 m = 12000 J.
(iii) Useful work done = Load x g x distance covered
= 20 x 10 x 20 = 4000 J.
(iv) Power = Total work done/ Time
= 12000/25W = 480 W.
plz mark me as brilliant
and thanks me
Similar questions
Accountancy,
2 months ago
English,
2 months ago
Geography,
2 months ago
World Languages,
5 months ago
English,
5 months ago
English,
10 months ago