List of top Physics Questions on Centre of mass asked in KEAM

When the total external force acting on a moving system is zero, the velocity of the center of mass

If two objects of mass $m_1 = 80$g and $m_2 = 120$g moves with same speed 6cm/s, find the velocity of centre of mass

If external force acting on a body is zero, centre of mass of body

Two objects of masses \( 1\,\text{kg} \) and \( 2\,\text{kg} \) are moving towards each other with accelerations \( 2\,\text{m s}^{-2} \) and \( 3\,\text{m s}^{-2} \) respectively on a smooth horizontal surface. The acceleration of centre of mass of the system is

Four identical point masses are placed at the corners of a square ABCD and the centre of mass lies at the centre O of the square. If the mass at B is removed, then the centre of mass lies at the point

A shell travelling along a parabolic path in the gravitational field of the earth undergoes explosion in mid air. The centre of mass of the fragments will move

Four particles of masses \(m_1=1\) kg, \(m_2=2\) kg, \(m_3=1\) kg and \(m_4=m\) are placed at the four corners of a square. The mass \(m_4\) required, so that the centre of mass of all the four particles is exactly at the centre of the square is

The position vectors of two identical particles with respect to the origin in three dimensional coordinate system are \( \vec{r}_1 \) and \( \vec{r}_2 \). The position vector of centre of mass of the system is given by

Two objects P and Q initially at rest move towards each other under mutual force of attraction. At the instant when the velocity of P is \(v\) and that of Q is \(2v\), the velocity of centre of mass of the system is