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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 transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- An iron rod of volume 10⁻⁴ m³ and relative permeability 1000 is placed inside a long
- If the momentum of electron is changed by P, then the de-Broglie wavelength
- When ₉₀Th²²⁸ transforms to ₈₃Bi²¹², the number of emitted α and β particles
- The value of n so that vectors 2i+3j-2k, 5i+nj+k and -i+2j+3k may be coplanar,will be
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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