Center of MassMediumBloom L3
Question
A man weighing 80 kg is standing at the centre of a flat boat and he is 20 m from the shore. He walks 8 m on the boat towards the shore and then halts. The boat weight 200 kg. How far is he from the shore at the end of this time?
Options
A.11.2 m
B.13.8 m
C.14.3 m
D.15.4 m
Solution
Sol. Let the displacement of boat be x towards the shore
80 (x + 8) + 200 x = 0
⇒ x = $\frac{- 640}{280} = - \frac{16}{7}$
∴(∆x) = $8 - \frac{16}{7} = \frac{40}{7}$
∴ New distance from shone
= $20 - \frac{40}{7} = \frac{100}{7}$= 14.28m ≈14.3m
Create a free account to view solution
View Solution FreeMore Center of Mass Questions
The centre of mass of the shaded portion of the disc is : (The mass is uniformly distributed in the shaded portion) :...Assuming potential energy 'U' at ground level to be zero.All objects are made up of same material.UP = Potential energy ...A sector cut from a uniform disk of radius 12 cm and a uniform rod of the same mass bent into shape of an arc are arrang...A non–zero external force acts on a system of particles. The velocity and acceleration of the centre of mass are found t...Two particle of mass m each are tied at the ends of a light string of length 2a. Thewhole system is kept on a frictionle...