We're asked to find the final velocity, v x. ‍ So, let's get v x ‍ by itself by taking the square root of both sides of the equation:

So let's figure out the final velocity-- the vertical and the horizontal components of that final velocity. And then we can reconstruct the total final velocity.

It says that in an elastic collision, if you take the initial and final velocity of one of the objects, that has to equal the initial plus final velocity of the other object, regardless of what the masses of …

Police give tickets based on instantaneous velocity, but when calculating how long it will take to get from one place to another on a road trip, you need to use average velocity.

You don't need to find the acceleration in that sum because to find the force you only need to subtract final velocity and initial velocity divide by time.

Displacement in physics is a vector quantity that measures the change in position of an object over a given time period. Learn how to calculate an object’s displacement as a function of …

To find angular velocity for a ball moving back and forth, you will have to find the beginning angle and the final angle at where the ball stops moving. Then find the difference between the two …

In this video, David solves an example elastic collision problem to find the final velocities using the easier/shortcut approach.

Our average velocity is your initial velocity plus your final velocity divided by 2, if we assume acceleration is constant. So it's literally just the arithmetic mean of your initial and final velocities.

It is intuitive to see that the average velocity in this time period would be the middle point of the line. This middle point would be the total velocity divided by 2. Therefore, average velocity is …