What is Kinematics?

Which kinematic equation does not include displacement (d)? Fill in the blank: ___

• Vf = Vi + at

• d = (Vi + Vf)t/2

Which kinematic equation does not include acceleration (a)? Fill in the blank: ___

• d = 0.5 (Vf + Vi) t

• Vf = Vi + at

Which kinematic equation does not include final velocity (Vf)? Fill in the blank: ___

• Vf = Vi + at

• Vf = (Vi + Vf)/2 * t

Which kinematic equation does not include initial velocity (Vi)? Fill in the blank: ___

• d = Vit + 0.5 at^2

• Vf = Vi + at

Which kinematic equation does not include time (t)? Fill in the blank: ___

• Vf = Vi + at

• d = (Vi + Vf)/2 * t

Which kinematic equation does not include final velocity (Vf)? Fill in the blank: ___

• a = (Vf - Vi) / t

• Vf = Vi + at

When solving kinematic problems, what does Δx represent and how can it be re-written?

• Δx is a change in position, or displacement, and can be re-written as xf - xi.

• Δx is a change in velocity, and can be re-written as vf - vi.

• Δx is a change in acceleration, and can be re-written as af - ai

• Δx is a change in time, and can be re-written as tf - ti.

What is the final step to ensure your solution to a kinematic problem is correct?

• Verify that your solution makes sense.

• Ignore any discrepancies in your answer.

• Assume your calculations are always correct.

• Skip checking units and significant figures.

• 45 m/s

• 30 m/s

• 15 m/s

• 60 m/s

An astronaut standing on the Moon drops a hammer. If the hammer falls 5.4 m vertically in 2.3 s, what is its acceleration?

• 1.0 m/s²

• 2.0 m/s²

• 2.0 m/s²

• 2.1 m/s²