CBSE Class 11-science - Motion of Centre of Mass Videos

• can we say that if a body's centre of mass is at rest then its linear momentum is always conserved? please support the doubt with a suitable example...
• In which type of motion the position of centre of mass remains unchanged?
• What will be the position of centre of mass of a two particle system with unequal masses?
• What will be the position of centre of mass of a system having two particles of masses M and m (M > m) separated by a distance d?
• A projectile projected at a certain angle with the horizontal hits the ground at P. However, if this particle explodes at the highest point into two pieces of equal mass. One piece falls to the ground vertically downwards at Q, while the other travels horizontally and hit the ground at R. What is the distance of R from P?
• Explain briefly the motion of centre of mass?
• A body X of mass M while falling vertically downwards under the effect of gravity break in to two parts A and B having masses M/5 and 4M/5 respectively. How does the centre of mass of bodies A and B taken together shift compared to that of body X?
• There are two men standing facing each other on two boats floating on still water at a short distance apart. A rope is held at its ends by both. Explain why the two boats meet at same point when each man pulls the rope separately or both pull together? Will the time taken be different in the two cases? (Neglect Friction)
• Explain the motion of Earth-Moon system around the sun in terms of centre of mass concept.
• How will you prove that the centre of mass of two particles divides the line joining the particles in the inverse ratio of their masses?

Queries asked on Sunday & after 7 pm from Monday to Saturday will be answered after 12 pm the next working day.