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प्रश्न
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gap in the following statement using the following terms.
The type of force responsible for a change in the state of motion of the arrow is an example of a ______ force.
विकल्प
muscular
contact
non-contact
gravity
friction
shape
attraction
उत्तर
The type of force responsible for a change in the state of motion of the arrow is an example of a contact force.
Explanation:
Since muscular force can be applied only when in contact with an object, it is also called a contact force. Muscular force is a contact force applied when muscles contract, such as when the archer pulls back the bow string. This force stores potential energy in the bow.
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संबंधित प्रश्न
Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
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.
Winnowing foodgrain: ______
Explain in your own words and give one example.
Gravitational 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
Write an answer to the following question in your own words.
Which machines run on muscular force?
List out the types of forces on the basis of contact.
Which one of the following forces is a contact force?
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.
