# Are two identical objects moving in opposite directions at the same speed will the forward moving object have the greatest momentum?

## Are two identical objects moving in opposite directions at the same speed will the forward moving object have the greatest momentum?

Two identical objects are moving in opposite directions at the same speed. The forward moving object will have the greatest momentum. TRUE, because momentum is a vector, and the object moving in the opposite direction from the forward moving object has a negative velocity.

## Why is velocity negative after a collision?

Remember, momentum is a vector so the direction of the motion — and the sign of the velocity or the momentum — is very important! The negative sign means that the system moves to the left. Example: Two cars collide at an intersection as sketched below.

## What happens when 2 identical objects collide while moving at the same speed?

Both momentum and kinetic energy are conserved quantities in elastic collisions. Suppose two similar trolleys are traveling toward each other with equal speed. They collide, bouncing off each other with no loss in speed. This collision is perfectly elastic because no energy has been lost.

## Why do objects move when 2 forces act on the object in opposite directions?

When two unequal forces act in opposite directions on an object, the net force is the difference of the two forces. In the example below, the net force would be 50 Newtons (500 – 450 = 50), and the object would move to the left because the force pulling to the left is greater.

## Can velocity start negative?

Velocity: The velocity of an object is the change in position (displacement) over a time interval. Velocity includes both speed and direction, thus velocity can be either positive or negative while speed can only be positive. Another way to say this is that speed is the absolute value of velocity.

## What happens when two objects with unequal mass 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.

## Can velocity increase after collision?

The velocity change of two respective objects involved in a collision will always be equal. While individual objects may change their velocity during a collision, the overall or total velocity of the colliding objects is conserved.

## Is momentum always conserved?

Momentum is always conserved because there is no external force acting on an isolated system (like the universe). Since momentum can never change, all of its components will always remain constant. Problems brought on by collisions should be resolved using the rule of conservation of momentum.

## Can momentum be transferred from one object to another?

Conservation of Momentum: In the absence of an external force, the momentum of a system remains unchanged. What this means is that as objects come in contact with each other, momentum is transferred from one item to the next without a net gain or loss in momentum.

## What are the 2 types of collision?

• Inelastic collisions: momentum is conserved,
• Elastic collisions: momentum is conserved and kinetic energy is conserved.

## When two identical objects are moving in opposite directions at the same speed?

Two identical objects are moving in opposite directions at the same speed. The forward moving object will have the greatest momentum. An object with a changing speed will have a changing momentum.

## What happens to the momentum of two objects moving with same speed but in opposite directions upon collision?

Two objects of equal mass moving with equal speeds in opposite directions have a total momentum of zero, but their total kinetic energy is definitely nonzero.

## When two identical balls are moving with equal speed in opposite direction?

Solution: When two identical balls are moving with equal speeds in opposite directions, then momentum is zero, and kinetic energy is not zero. Let the mass of the balls be m1 and m2 and their velocities v1 and v2 respectively.