The masses of two bodies are measured to be `15.7 +- 0.2` kg and `27.3 +- 0.3` kg. What is the total mass of the two and error in it.

Locate the centre of mass of the syste,m of three particles of masses m_1 = 1 kg, m_2 = 2 kg and m_3 = 3 kg which are placed at the corners of an equilateral triangle of side 1 m.

The masses of two spheres are 10 kg and 20 kg respectively. If the distance between their centres is 100 m , find the magnitude of the gravitational force betweem them.

In an experiment to determine the volume of an object, mass and density are recorded as m = (5 pm 0.15) kg and rho (5 pm 0.2)kg m^(-3) respectively. Calculate percentage errorin the measurement of volume.

Two bodies of masses 1 kg and 2 kg, separated by 6 m are rotating about the centre of mass of the system. The moment of inertia of the system is

The mass of a cannon is 500 kg and it recoils with a speed of 0.25 m//s . What is momentum of the cannon?

Two persons of masses 55 kg and 65 kg respectively are at the opposite ends of a boat. The length of the boat is 3.0 m and weights 100 kg . The 55 kg man walks up to the 65 kg man and sits with him. If the boat is in still water the centre of mass of the system shifts by.

A bomb of 12 kg expledes into 2 pieces of masses 4 kg and 8 kg mass is 6ms^-1 . What is K.E of the other mass?

A ball of 0.1 kg makes an elastic head on collision with a ball of unknown mass that is initially at rest. If the 0.1kg ball rebounds at one third of its original speed, what is the mass of the other ball?

Centre of mass of 3 particles 10 kg, 20 kg and 30 kg is at (0, 0, 0). Where should a particle of mass 40 kg be placed so that the combination centre of mass will be at (3,3,3)

Choose the correct options The centre of mass of a system of two uniform spherical masses of 5 kg and 35 kg with centres of them 0.7 m apart is