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

by Ron Kurtus (revised 27 December 2010)

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



1. If the initial velocity is 32 ft/s, what is the velocity at 1 second?

64 ft/s

32 ft/s

You also need the displacement to solve the problem

2. If the initial velocity is 10 m/s, what is the displacement at v = 20 m/s?

y = (20 − 10)/19.6 meters

y = (400 − 100)/19.6 meters

y = (400 − 100)/64 feet

3. How long does it take a ball thrown downward to hit the ground?

It only depends on the displacement to the ground

12.3 seconds

It depends on the initial velocity and the height from which it was thrown

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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