Advertisements
Advertisements
Question
Define 1 J of work.
Solution
1 J is the amount of work done by a force of 1 N on an object that displaces it through a distance of 1 m in the direction of the applied force.
APPEARS IN
RELATED QUESTIONS
Name a common device where a gear train is used
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.
Explain by an example that a body may possess energy even when it is not in motion.
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
Name the physical quantity whose SI unit is Nm.
Why does a spanner have a long handle?
A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?
A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?
Distinguish between work and power.
Name the physical quantity associated with the 'rate of doing work'.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
What is the difference between renewable and non-renewable resources?
What are the advantages and disadvantages of using solar cells for producing electricity?
A force can cause an object to change its ______.
