Chapter 8 – COM, Momentum and Collision
Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 8 - COM, Momentum and Collision
Four particles of masses m1=2m,m2=4m,m3=m and m4 are placed at four corners of a square. What should be the value of m4 , so that the centre of mass of all the four particles are exactly at the centre of the square?
26
Nov
Four particles of masses m1=2m,m2=4m,m3=m and m4 are placed at four corners of a square. What should be the value of m4 , so that the centre of mass of all the four particles are exactly at the centre of the square? Four particles of masses m1=2m m2=4m m3=m and m4 are placed at four [...]
A metre rule, weighing 100 g rests on a table with a part projecting over the edge. the length of the part projecting out if a 5 g body hung at the end just tills the rule is .
26
Nov
A metre rule, weighing 100 g rests on a table with a part projecting over the edge. the length of the part projecting out if a 5 g body hung at the end just tills the rule is . A metre rule weighing 100 g rests on a table with a part projecting over the [...]
An object comprises of a uniform ring of radius R and its uniform chord AB (not necessarily made of the same material) as shown in figure Which of the following can not be the centre of mass of object?
26
Nov
An object comprises of a uniform ring of radius R and its uniform chord AB (not necessarily made of the same material) as shown in figure Which of the following can not be the centre of mass of object? A particle of mass m is made to move with uniform speed v along the perimeter [...]
A uniform rod of length l is kept vertically on a rough horizontal surface at x = 0. It is rotated slightly and released. When the rod finally falls on the horizontal surface, the lower end will remain at
26
Nov
A uniform rod of length l is kept vertically on a rough horizontal surface at x = 0. It is rotated slightly and released. When the rod finally falls on the horizontal surface, the lower end will remain at A uniform rod of length l is kept vertically on a rough horizontal surface at x [...]
A force F=(2i^+j^+3k^) N acts on a particle of mass 1 kg for 2s. If initial velocity of particle is u=(2j^+i^m/s. Speed of particle at the end of 2s will be
26
Nov
A force F=(2i^+j^+3k^) N acts on a particle of mass 1 kg for 2s. If initial velocity of particle is u=(2j^+i^m/s. Speed of particle at the end of 2s will be A force F=(2i^+j^+3k^) N acts on a particle of mass 1 kg for 2s. If initial velocity of particle is u=(2j^+i^m/s. Speed of particle [...]
From a circular disc of radius R, a square is cut out with a radius as its diagonal. The distance of the center of the mass of of the remainder from the center of the disc is
26
Nov
From a circular disc of radius R, a square is cut out with a radius as its diagonal. The distance of the center of the mass of of the remainder from the center of the disc is a square is cut out with a radius as its diagonal. The distance of the center of the [...]
A particle of mass m is made to move with uniform speed v along the perimeter of a regular polygon of 2 n sides. The magnitude of impulse applied at each corner of the polygon is:
26
Nov
A particle of mass m is made to move with uniform speed v along the perimeter of a regular polygon of 2 n sides. The magnitude of impulse applied at each corner of the polygon is: A particle of mass m is made to move with uniform speed v along the perimeter of a regular [...]
The centre of mass of a non-uniform rod of length L whose mass per unit length λ=L/kx2 where k is a constant and x is the distance from end P is:
26
Nov
The centre of mass of a non-uniform rod of length L whose mass per unit length λ=L/kx2 where k is a constant and x is the distance from end P is: The centre of mass of a non-uniform rod of length L whose mass per unit length λ=L/kx2 where k is a constant and x [...]
Two blocks of masses 3kg and 6kg respectivley are placed on a smooth horizontal surface. They are connected by a light spring of force constant k=200N/m . Initially the spring is unstretched. The indicated velocities are imparted to the blocks. Find the maximum extension of the spring.
26
Nov
Two blocks of masses 3kg and 6kg respectivley are placed on a smooth horizontal surface. They are connected by a light spring of force constant k=200N/m . Initially the spring is unstretched. The indicated velocities are imparted to the blocks. Find the maximum extension of the spring. Displacement of a particle of mass 2 kg [...]
A particle of mass 1 kg is projected at an angle of 30degree with horizontal with a velocity v=40 m/s. The change in linear momentum of the particle after time t=1 s will be: (g=10m/s2)
26
Nov
A particle of mass 1 kg is projected at an angle of 30degree with horizontal with a velocity v=40 m/s. The change in linear momentum of the particle after time t=1 s will be: (g=10m/s2) A particle of mass 1 kg is projected at an angle of 30degree with horizontal with a velocity v=40 m/s. [...]