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The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is
Options
(a) 4ms⁻² upwards
(b) 4 ms⁻² downwards
(c) 14 ms⁻² upwards
(d) 30 ms⁻² downwards
Correct Answer:
4ms⁻² upwards
Explanation:
Net force, F = T – mg
ma = T – mg
2000a = 28000 – 20000 = 8000
a = 8000 / 2000 = 4 ms⁻² upwards
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Question Type: Memory
(964)
Difficulty Level: Easy
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Topics: Laws of Motion
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a ionised gas,the mobile charge carriers are
- A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- A moving coil galvanometer of resistance 100 Ω is converted to ammeter by a resistance
- A radioactive sample S₁ having an activity of 5 μCi has twice the number of nuclei
- A fluid is in streamline flow across a horizontal pipe of variable area of cross section
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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