Question

(a) (i) Define moment of force.
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(ii) Write the relationship between the SI and CGS unit of moment of force.
(b) Define a kilowatt hour. How is it related to joule?
121
12]
(c) A satellite revolves around a planet in a circular orbit. What is the work done
by the satellite at any instant? Give a reason.
(d) (i) Identify the class of the lever shown in the diagram below:
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(ii) How is it possible to increase the M.A. of the above lever without increasing
its length?
(e) Give one example of each when:
[2]
(1) Chemical energy changes into electrical energy.
(ii) Electrical energy changes into sound energy.​

Answer 1

Answer:

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