AIPMT MAINS2009Physics-Laws of Motion
AIPMT MAINS 2009 Physics Dynamics of a Lift MCQ Question
Type: MCQ-numerical-Medium-Class 11
The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is:
A
4 ms⁻² upwards.
B
4 ms⁻² downwards.
C
14 ms⁻² upwards.
D
30 ms⁻² downwards.
Correct Answer
Option A
Detailed Explanation
Using Newton's second law, T - mg = ma, where T = 28000 N, m = 2000 kg, g = 9.8 m/s². Solving gives a = (T/m) - g = 4 m/s² upwards.
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