Advertisements
Advertisements
Question
In which of the following cases is work being done:
- A boy pushing a heavy rock
- A boy climbing up the stairs
- A coolie standing with a box on his head
- A girl moving on the road.
Advertisements
Solution
work being done in the following cases
(b) A boy climbing up the stairs
(d) A girl moving on the road.
APPEARS IN
RELATED QUESTIONS
The S.I. unit of work is
How is work related to energy?
What are the quantities on which the amount of work done depends? How are they related to work?
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
State the energy changes which take place when A toy car with a wound spring moves on ground.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
Who is the odd one out?
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
