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If rope of lift breaks suddenly, the tension exerted by the surface of the lift (a = Acceleration of lift) is
Options
(a) mg
(b) m(g+a)
(c) zero
(d) m(g-a)
Correct Answer:
zero
Explanation:
If the rope suddenly breaks, acceleration = g
So substituting in formula, tension T=m(g−a)=0
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Topics: Laws of Motion
(103)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A choke is preferred to a resistance for limiting current in AC circuit because
- A motorcycle moving with a velocity 72 kmh⁻¹ on a flat road takes a turn
- The minimum velocity (in ms⁻¹) with which a car driver must traverse a flat curve
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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