Physics
Read the clues across and clues downwards and fill up the blank squares.
Across :
- When you burn a coil, the energy released …………… .
- Door bell converts electrical energy into …………… energy.
- Windmill converts mechanical energy into …………… energy.
- The energy stored in food items …………… .
Down :
- In electromagnet, electrical energy converts into …………… energy.
- Arrow on a stretched bow possesses …………… energy.
- A stretched rubber band has …………… energy.
- The energy stored in atoms is …………… energy.
- In photosynthesis we require …………… energy.
Related Questions
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
State the changes in form of energy while producing hydro-electricity.
A truck starts from rest on a plane road. What are the possible energy changes taking place while the truck is in motion?
Sushila goes to a park and rides a swing. When she reaches the highest point, she pauses for a fraction of a second before coming down. At the lowest point she moves the fastest. She keeps swinging without anyone pushing again and again for some time. She does not know the reason.
Answer the following :
(i) Which mechanical energy is maximum at the highest point ?
(ii) Which mechanical energy is maximum at the lowest point ?
(iii) Is mechanical energy generated again when she swings back up ?
(iv) Give one condition when the swing may finally stop with reason.
(v) What information is given by the passage about energy ?