A: During collision between two objects, themomentum of colliding objects is conservedonly in direction perpendicular to line ofimpact.R The force on colliding objects in directionperpendicular to line of impact is zero.

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Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision.

The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional.

Which of the following collision is one-dimensional?

Q. In a collision between two solid spheres. velocity of separation along the line of impact (assume no external forces act on the system of two spheres during impact):

Q. An object of mass 0.4 kg moving with velocity of 4 m/s collides with another object of same mass moving in same direction with velocity of 2 m/s. If the collision is perfectly inelastic (plastic), then what will be the loss of K. E due to impact?

Two objects,each of mass 1.5 kg,moving in a stragiht line but in opposite directions. the velocity of each object is 2.5 m/s before collision during which they stick together. what will be velocity after collision?

Q. two objects each of mass 1.5kg moving in a staight line in opposite directions aand the velocity of the object is 2.5 m/s before the collision during which they stick together. what will be the velocitt of the combined object after collision

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