Question

1. SI unit of work or energy is joule.
2. The product of force and displacement caused by it is called pressure
3. A student preparing his lessons for monthly test does hard work
4. A boy carrying a school bag on his shoulder does no work.
5. The more the force is applied on a body to cause displacement the one is the work done
5. A stretched bow and arrow system has kinetic energy
7. Kinetic energy of a body is directly proportional to the square of its speed.
. A flying aeroplane has only kinetic energy-
. The energy possessed by water in hydroelectric dam is potential emers​

Answer 1

Answer:

address true or false please explain the question

Answer 2

Answer:

1. true

2. false

3. false

true