## What happens in an elastic collision with different masses?

15.4 Elastic Collision of Two Unequal Mass Objects A smaller mass approaching a larger mass will bounce back in a collision. If a larger mass is intially moving toward a smaller mass, both will continue with momentum in the direction of the intial momentum.

**What happens when two unequal masses collide?**

In accord with Newton’s second law of motion, the acceleration of an object is dependent upon both force and mass. Thus, if the colliding objects have unequal mass, they will have unequal accelerations as a result of the contact force that results during the collision.

### Do elastic collisions have the same mass?

Collisions of atoms are elastic, for example Rutherford backscattering. A useful special case of elastic collision is when the two bodies have equal mass, in which case they will simply exchange their momenta.

**What will happen if an object collides with another stationary object of a greater mass?**

When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater momentum change.

## What happens when a moving object hits a stationary one?

One force, acting on previously moving object, slows it down from initial velocity V to a velocity equaled to zero, and the other force, equal to the first in magnitude but opposite in direction, acting on previously stationary object, accelerates it up to a velocity of the previously moving object.

**What happens in an elastic collision when one object is at rest?**

Both objects cannot be at rest. It is possible for one of the objects to be at rest after the collision. For example, if the masses of the two objects are equal, then after a head-on elastic collision the object initially at rest is moving and the object initially moving is at rest.

### What happens when the same force is applied to two objects of different masses?

The second law shows that if you exert the same force on two objects of different mass, you will get different accelerations (changes in motion). The effect (acceleration) on the smaller mass will be greater (more noticeable).

**When the collision is elastic and the masses are the same what happens with the velocities?**

Elastic Collision, Equal Masses This may be generalized to say that for a head-on elastic collision of equal masses, the velocities will always exchange. For a non-head-on elastic collision between equal masses, the angle between the velocities after the collision will always be 90 degrees.

## When a body collides against a stationary body of equal mass?

For a head-on collision with a stationary object of equal mass, the projectile will come to rest and the target will move off with equal velocity. Hence, the velocities are interchanged i.e. the speeds are interchanged which in turn interchanges the momentum.

**What happens when a moving ball hits a stationary ball of equal mass?**

Elastic Collision, Equal Masses For a head-on collision with a stationary object of equal mass, the projectile will come to rest and the target will move off with equal velocity, like a head-on shot with the cue ball on a pool table.

### What is collision elastic collision in one dimension?

Section Summary. An elastic collision is one that conserves internal kinetic energy. Conservation of kinetic energy and momentum together allow the final velocities to be calculated in terms of initial velocities and masses in one dimensional two-body collisions.

**Do two objects with different masses have the same acceleration?**

The force that objects feel may be different because they have different masses, but the acceleration on Earth they experience is exactly the same.