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Mini-Quiz: Overview of Gravity Equations for Objects Projected Upward

by Ron Kurtus (revised 31 December 2010)

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

1. For an object projected upward, when t = 0, what does v equal?

v = vi

v = 0

v = −vi

2. What is the equation for the maximum height of a ball thrown upward at 10 m/s?

ym = (v2 − vi2)/2g

ym = −vi2/2g

ym = gt2/2 + vit

3. If an object is thrown upward at −40 ft/s, what is the elapsed time when v = −8 ft/s?

t = (−8 − 40)/32 = −1.5 seconds

t = (8 + 40)/32 = 1.5 seconds

t = (−8 + 40)/32 = 1 second

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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