Part one:
Multiple choose
1.
Which of the following is SI unit of period?
(c) Second
(b) Hertz
(c)
Meter
2. The number of cycles make in one
second is called:
a)
Period ...
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Class:
form one: Subject:
Physics
Chapter 7
WORK,POWER, ENERGY AND SIMPLE MACHINES
7.1 work
Definition
Work is done when a force causes an object to move in the same
direction that the force is applied.
We therefore measure...