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Motion in One Dimension — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSMotion in One Dimension2 Marks
Question
Define the term acceleration due to gravity. State its value in C.GS. as well as in S.I. system. When is acceleration due to gravity
1. positive
2. negative?
✓

Answer

Acceleration due to gravity: The acceleration of a freely falling body, under the action of gravity of earth, is called acceleration due to gravity. It is represented by 'g'.
In S.I. system, g = 9.8 ms; In C.GS. system, g = 980 cms If a body falls towards the earth, then value of acceleration due to gravity is positive.
If the body rises vertically upwards, then value of acceleration due to gravity is negative.

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