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Question
Write answers to the following questions in your own words.
(a) What are the things that can be done by applying force?
(b) What is meant by weight?
(c) Which machines run on muscular force?
(a) What are the things that can be done by applying force?
(b) What is meant by weight?
(c) Which machines run on muscular force?
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Solution
(a) Following things can be done by applying force:
(i) It can move a body initially at rest.
(ii) It can bring a moving body to rest.
(iii) It can change the direction of a moving body.
(iv) It can change the speed of a moving body.
(v) It can change the shape of a body.
(vi) It can change the size of a body.
(b) Weight is the force exerted on a body due to the gravitational pull of Earth.
(c) Machines which run on muscular force are:
- Bicycle
- Rickshaw
- Hand pump
- Stitching machine
- Hand cart
| (i) It can move a body initially at rest. |
| (ii) It can bring a moving body to rest. |
| (iii) It can change the direction of a moving body. |
| (iv) It can change the speed of a moving body. |
| (v) It can change the shape of a body. |
| (vi) It can change the size of a body. |
(b) Weight is the force exerted on a body due to the gravitational pull of Earth.
(c) Machines which run on muscular force are:
- Bicycle
- Rickshaw
- Hand pump
- Stitching machine
- Hand cart
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