The ratio of the weight of a man in a stationary lift and when it is moving downwards

The Ratio Of The Weight Of A Man In A Physics Question

The ratio of the weight of a man in a stationary lift and when it is moving downwards with uniform acceleration a is 3:2,then the value of a is

Options

(a) 3/2 g
(b) g/3
(c) g
(d) 2/3g

Correct Answer:

g/3

Explanation:

Weight when stationary = mg

Weight when moving downwards = m(g-a)

3/2 = mg/m(g-a)
3g – 3a = 2g
⇒ a = g/3

Related Questions:

  1. Two forces of magnitude 8N and 15N respectively act at a point so as to make the resultant force
  2. The half-life of a radioactive substance is 30 min. The time (in minutes) taken
  3. An a.c. supply gives 30 volt r.m.s which passes through a 10Ω resistance.
  4. The velocity of a particle at an instant is 10 ms⁻¹ and after 5 s the velocity
  5. A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value

Topics: Laws of Motion (103)
Subject: Physics (2479)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*