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A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds,the next 5 seconds and the next 5 seconds respectively. The relation between h1, h2 and h3 is
Options
(a) h1= h2/3= h3/5
(b) h2= 3h1 and h3 = 3h2
(c) h1= h2= h3
(d) h1= 2h2= 3h3
Correct Answer:
h1= h2/3= h3/5
Explanation:
h = 1/2 gt² h₁ = 1/2 g(5)² = 125
h₁ + h₂ = 1/2 g (10)² = 500
h = 375
h₁ + h₂ + h₃ = 1/2 g (15)² = 1125
h₃ = 625 h₂ = 3h₁, h₃ = 5h₁
or h₁ = h₂ / 3 = h₃ / 5
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Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A man measures time period of a pendulum(T) in stationary lift. If the lift moves upwards
- A remote-sensing satellite of earth revolves in a circular orbit at a height
- The total kinetic energy of a body of mass 10 kg and radius 0.5 m moving with a velocity
- A small oil drop of mass 10⁻⁶kg is hanging in at rest between two plates seperated
- The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
Topics: Motion in Straight Line (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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