Question

At time t=2.3 s, a 4-kg block that initially moves with a constant speed of 6 m/s undergoes an inelastic collision with another block. Any two inertial observers must agree that...

1. The event took place at t=2.3 s
2. The initial speed of the block is 6 m/s
3. The initial momentum of the block has a momentum of 24 kg*m/s
4. The second block is moving after the collision
5. The momentum of the two-block system is conserved after the collision.

Answer 1

Ans -

A , B , C , E

A- Event took place at given time as mentioned in question

B - as given the speed is constant so the initial speed is 6 m/ s

C momentum = mass x velocity

= 6 x 4 = 24

D- second block will move or not it can't be said it depends on the mass of the block if the mass is high inertia will be high and the first block will rebound after collision and second will not move if force imparted after collision is not enough to counter the mass inertia of second block

E - in both elastic and inelastic collision the momentum remains conserved so this fact will also be true but in inelastic collision the kinetic energy will not be remains constant .