Home
Class 11
PHYSICS
A man stretching in free space changes t...

A man stretching in free space changes the shape of his body, e.g. by spreading his arms or curtting up. By doing this, he can change his

A

a,b and c

B

d,a and b

C

c,d and a

D

b,c and d

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

A man spinning in free space changes the shape of his body, eg. By spreading his arms or curling up. By doing this, he can change his.

A man spinning in free space can change the moment of inertia of his body (I) by changing its shape. In this process,

A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is

During evolution of man many changes have taken place in his ancestral characters. Which one of the following is an unsignificant change

A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by 2 ms^(-1) and the boy changes his speed by x ms^(-1) so that the kinetic energies of the boy and the man are again equal. Then x in ms^(-1) is

A man invested Rs 9,000 in 3% (Rs 100) shares at a discount of 10% He sold all the shares at the rate of Rs 95 each and invested the processed in 4% (Rs 50) shares at par. Find the change in his income.

A man is sitting on a rotating stool with his arms outstretched. If suddenly he folds his arms the angular velocity of the man would

A man stands on a rotating platform, with his arms stretched horizontal holding a 5 kg weight in each hand. The angular speed of the platform is 30 revolutions per minute. The man then brings his arms close to his body with the distance of each weight from the axis changing from 90 cm to 20 cm . moment of inertia of the man together with the platform may be taken to be constant and equal t 7.6 kg m^(2) . (a) What is the his new angular speed ? (Neglect friction.) (b) Is kinetic energy conserved in the process ? If not, from where does the change come about ?

A boy stands over the centre of a horizontal platform which is rotating freely with a speed of 2 "revolutions"//s about a vertical axis through the centre of the platform and straight up through the boy. He holds 2 kg masses in each of his hands close to his body. The combined moment of inertia of the system is 1 kg xx metre^(2) . The boy now stretches his arms so as to hold the masses far from his body. In this situation, the moment of inertia of the system increases to 2 kgxxmetre^(2) , The kinetic energy of the system in the latter case as compared with that in the previous case will