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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A 120 m long train is moving in a direction with speed 20 m/s.A train B moving
- A wire of length L metre carrying a current I ampere is bent in the form
- A circular disc of radius R and thickness R/6 has moment of inertia I about an axis
- Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
- The half-life of a radioactive substance is 30 min. The time (in minutes) taken
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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