Fill in the blanks.
(1) Newton’s first law gives the idea of ……… .
(2) By Newton’s second law , the acceleration is directly proportional to ……… .
(3) Newton’s third law express the idea of ………. .
(4) Action force and reaction force cannot ……… out each other.
(5) Force has both magnitude and ……. .
(6) Force is a ……… quantity.
(7) The SI unit for force is ……….. .
(8) Mass is a measure of ………. .
(9) The attracting force of the earth acting on a body is defined
.A physical quantity must be expressed with its number and ……….. . 1.unit
- A unit is a ……….. quantity. 2.standard
- Mass is a ……..quantity. 3.basic
4.Area is a ……….quantity. 4.derived
5.The British system is also called the ……. system. 5.FPS - Length , mass and ……. called basic quantities. 6.time
7.The unit of mass in CGS system is ……….. . 7.gram
8.We use a ruler for measuring ……….. . 8.length - The SI unit of area is the ……… . 9.m2
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