Which of the following is the mathematical representation of law of conservation of total linear momentum?
  • a) dP/dt = 0
  • b) dF/dt = 0
  • c) dP/dt = Finternal
  • d) dF/dt = P
A ball of mass 2kg is moving with a speed of 10m/s along a flat surface. It collides with another ball of mass 3kg and comes to rest, what will be the speed of the second ball after collision?
  • a) The above said situation is not possible
  • b) 20m/s
  • c) Zero
  • d) 6.67m/s
On collision of two balls linear momentum is conserved, it implies that even kinetic energy will remain conserved. True or False?
  • a) True
  • b) False
In the given figure, ball 1 has an initial velocity of 5m/s. Ball 2 is initially at rest. After collision ball 2 moves with a speed of 2m/s in the direction shown & ball 1 moves at an angle A. What is the value of angle A?
  • a) tan-1(1/3√3)
  • b) sin-1(1/3√3)
  • c) tan-1(1/√3)
  • d) tan-1(√3)
A radioactive particle at rest, having mass 10g, breaks into 2 fragments (1&in the mass ratio 2:3 respectively. If the first one moves with a velocity of 10m/s what will be the speed of the second particle?
  • a) 4.33 m/s
  • b) -4.33 m/s
  • c) -6.67 m/s
  • d) 6.67 m/s
There are two external forces acting on a system of particles. Select the correct statement.
  • a) Linear momentum is necessarily not conserved
  • b) Linear momentum may be conserved
  • c) Linear momentum is zero
  • d) Centre of mass will move with increasing speed
0 h : 0 m : 1 s