# Mini-Quiz: Derivation of Displacement-Velocity Gravity Equations

by Ron Kurtus (revised 7 January 2011)

Take this Mini-Quiz to check your understanding of the lesson material.

1. What must be derived before finding the displacement-velocity relationship?

Velocity-time and displacement-time relationships

The exact value of acceleration due to gravity

The initial velocity

2. What is the displacement equation if the initial velocity is zero?

The equation becomes impossible to solve

y = v2/2g

y = −vi2/2g

3. How can there be a positive and negative velocity?

They mean the same thing

It is an indication of before and after an object moves

It is an indication of opposite directions of the velocity

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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