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A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift.The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively
Options
(a) g,g
(b) g-a,g-a
(c) g-a,g
(d) a,g
Correct Answer:
g-a,g
Explanation:
Acceleration of man in lift a(man) = a
Acceleration of ball ⇒ a(ball) = g
⇒ Relative acceleration
a(rel) = a(base) – a(man) = (g-a)
.·. Acceleration observed by man in lift = g-a
Again for man standing outside a(man) = 0
So, a(relative) = g – 0 = g
.·. Acceleration observed by man standing outside = g
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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 bomb of mass 30 kg at rest exploded into two pieces of masses 18 kg
- A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
- A point source emits sound equally in all directions in a non-absorbing medium.
- The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
- Huygen’s principle of secondary wavelets may be used to
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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