Q.7. write answer to the following questions in your own words:
(1) what are the things that can be done by applying force?
2. what is meant by weight?
3.. which machines run on muscular force?
4). which forces are acting upon an aeroplane taking off into the sky?
5. why is powder sprinkled on a carrom board?
please solve this answer!
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Answers
Answer:
1)Following things can be done by applying force:
It can move a body initially at rest.
It can bring a moving body to rest.
It can change the direction of a moving body.
It can change the speed of a moving body.
It can change the shape of a body.
It can change the size of the body.
2)A measure of the heaviness of an object; the amount anything weighs. physics the vertical force experienced by a mass as a result of gravitation. It equals the mass of the body multiplied by the acceleration of free fall.
3)Machines which run on muscular force are:
Rickshaw. Hand pump. Stitching machine. Hand cart.
4)An airplane in flight is acted on by four forces: lift, the upward acting force; gravity, the downward acting force; thrust, the forward acting force; and drag, the backward acting force (also called wind resistance). Lift opposes gravity and thrust opposes drag .
5)The result of smoothening is that friction between the striker and the board decreases and striker slides smoothly on the surface, not losing its momentum too quickly. Hence, we can say that sprinkling of powder on the carrom board reduces friction and makes sliding smoother and easier.
hope it helps you!!
Answer:
1.Applying Force.
Explanation: