Advertisements
Advertisements
Question
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
Options
6000 J
0.6 J
0 J
6 J
Advertisements
Solution
The girl is moving with the bag on a levelled road. Her direction of motion is perpendicular to the direction of gravitational force. So, work done by the girl against gravity is zero. Therefore, the answer is 0 J
(c) 0 J
APPEARS IN
RELATED QUESTIONS
What is the work done by the moon when it revolves around the earth?
Define work.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
A uniform circular motion is an accelerated motion. Justify it.
Can work done be zero even if force acts on the body?
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
