Q.1
##### 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
Q.2
##### 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
Q.3
• a) True
• b) False
Q.4
##### 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)
Q.5
• a) 4.33 m/s
• b) -4.33 m/s
• c) -6.67 m/s
• d) 6.67 m/s
Q.6
##### 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