Advertisements
Advertisements
प्रश्न
An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?
Advertisements
उत्तर
On rubbing an inflated balloon with a piece of synthetic cloth, it becomes charged. A charged body attracts an uncharged body. When this charged balloon is pressed against a wall, it sticks to the wall. The force acting between the charged balloon and the wall is the electrostatic force.
APPEARS IN
संबंधित प्रश्न
Match the following:
| Group ‘A’ | Group ‘B’ | ||
| (i) | An ox pulling a cart | (a) | Magnetic force |
| (ii) | Lifting a heavy iron object with a crane | (b) | Electrostatic force |
| (iii) | Weighing with a spring balance | (c) | Muscular force |
| (iv) | Applying brakes to a bicycle | (d) | Gravitational force |
| (v) | Picking up pieces of paper with a plastic scale | (e) | Frictional force |
Explain in your own words and give one example.
The force of friction
Explain in your own words and give one example.
Magnetic force
Why an object thrown upwards comes down after reaching a point?
Why powder is sprinkled on a carrom board?
Write an answer to the following question in your own words.
What are the things that can be done by applying force?
Solve the following crossword puzzle.

Down:
(1) _______ force is to be applied to push a scooter that has failed.
(2) _________ force can be used to pick up scattered pins.
Across:
(1) A _______ pulls an iron nail towards itself.
(3) ________ force was used when the farm was ploughed with a tractor.
(4) It is due to the force of _________ that raindrops fall to the ground.
There are three solids made up of aluminium, steel and wood, of the same shape and same volume. Which of them would have the highest inertia?
An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down.
Non-contact forces, such as gravity and magnetism, are able to work over a distance because they act through what?
