# Mini-Quiz: Gravity Velocity Equations for Objects Projected Upward

by Ron Kurtus (revised 6 February 2011)

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

1. If vi = −19.6 m/s, what is the velocity at t = 5 s?

29.4 m/s

−29.4 m/s

9.8 m/s

2. If vi = −20 ft/s, what is the velocity at y = −2 ft?

v = ±√(128 + 400)

v = −√(128 − 400) and v = √(−128 + 400)

v = ±√(−128 + 400)

3. If vi = −10 m/s and g = 9.8 m/s2, what is v when y = 5 m?

v = ±√(98 + 100)

v = √(98 + 100)

v = √(98 − 100)

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.

Be courageous

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