Two Objects of Equal Mass Are Traveling with Identical Speeds

question 16

Short Answer

Two objects of equal mass are traveling with identical speeds v and collide. After the collision they travel together with a speed v/2. What was the angle between the original velocities?

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Definitions:

Half-Life

The time required for half of the atoms in a radioactive sample to decay, transforming into different atoms or into a lower energy state.

Half-Life

The time required for a quantity to reduce to half its initial amount, commonly used in describing the decay of radioactive materials.

Half-Life

The time required for half the quantity of a radioactive substance to undergo decay, also used in broader contexts to describe any type of exponential decay.

Half-Life

The time required for one half of the atoms of a radioactive substance to disintegrate into more stable materials.