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प्रश्न
Which one of the following forces is a contact force?
विकल्प
Force of gravity
Force of friction
Magnetic force
Electrostatic force
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उत्तर
Force of friction
Explanation:
Force of friction is a contact force. It always acts when the bodies are in contact.
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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 |
One or more forces are acting in the following example. Name them.
An object falling from a tall building: ______
Explain in your own words and give one example.
Electrostatic force
In what way are we different muscular force and mechanical force?
Write an answer to the following question in your own words.
What is meant by weight?
Force executed by touching the body is called non–contact force.
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?
A book resting on a table is being pushed upwards by the table. What is this upward force called?
Which component of the reaction force between two surfaces in contact is known as the frictional force?
When two bottles with magnets float on water and are brought close together, they move toward each other. Which condition causes this?
