Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and
v respectively. These trucks collide and stick together.
What is the speed of the trucks after the collision?
A body of mass m having an initial velocity v, makes head on elastic collision with a stationary body of mass
m. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will
happen only when:
Two projectiles βAβ and βBβ are thrown with same speed but at angle of 40 degree and 50 degree with the horizontal. The horizontal range of βAβ will be: