Advertisements
Advertisements
Question
Mention whether work is done or not in the following activity.
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | |
| 2. | Holding a doll | |
| 3. | Sitting in a bus | |
| 4. | Pushing a wall | |
| 5. | Digging soil |
Advertisements
Solution
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | Work done |
| 2. | Holding a doll | Not done |
| 3. | Sitting in a bus | Not done |
| 4. | Pushing a wall | Not done |
| 5. | Digging soil | Work done |
APPEARS IN
RELATED QUESTIONS
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
What is the condition for a force to do work on a body?
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
The work done on an object does not depend on the :
Each of the following statement describes a force acting. Which force is causing work to be done?
Can every force produce work?
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Give an example
Chemical energy changes to heat energy.
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
