# When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. Is that true or false? Why?

In an ideal case of "head-to-head" elastic collision of material points occurring during a relatively short period of time the statement is false.

One force, acting on previously moving object, slows it down from initial velocity

In practice we have to consider many factors here. The first one is elastic or inelastic collision takes place. If it's inelastic, the law of conservation of kinetic energy is no longer applicable since part of this energy is converted into internal energy of molecules of both colliding objects and results in their heating.

The amount of energy thus converted into heat significantly affects the force causing the movement of the stationary object that depends very much on the degree of elasticity and cannot be quantified without any assumption about objects, the material they are made of, shape etc.

Let's consider a simple case of almost elastic "head-to-head" collision (there are no absolutely elastic collisions) of one object of mass

Cancelling the mass

Therefore, the solution to this system of two equations with two unknowns velocities

The other algebraically correct solution

Since the previously moving object decelerates from

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False. When a moving object collides with a stationary object of identical mass, both objects experience the same magnitude of force during the collision. This is based on Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. Therefore, the force exerted by the moving object on the stationary object is equal in magnitude to the force exerted by the stationary object on the moving object.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- A ball with a mass of #8# #kg# moving at #5# #ms^-1# hits a still ball with a mass of #32# #kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
- How much momentum does a #500 kg# object moving at #1/50 m/s# have?

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