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CBSE Class 9 Answered

if the resultant of all forces acting on a body is zero in the case of balanced forces,then why it is said that the forces acting on a lift moving downwards with uniform motion are balanced?
Asked by aditi sharma | 20 Aug, 2011, 12:00: AM
answered-by-expert Expert Answer
For a lift moving downwards with uniform motion, acceleration is zero.
Force = mass x acceleration
So, force is also zero.
If an object has zero acceleration we must conclude that there is no resultant force acting on it.
So a lift moves with uniform motion even if the forces acting on it are balanced.
Answered by | 30 Aug, 2011, 09:32: PM

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