Look at the position vs. time graphs of these different objects. Which object has the greatest velocity?

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• I don't know

What position is object A at time t = 6 seconds

• 6 m

• 10 m

• 7 m

• 3 m

• I don't know

What is the velocity of object A?

• 2 m/s

• 3 m/s

• 7.5 m/s

• 0.5 m/s

• I don't know

Which of these velocity vs. time graphs corresponds to the position vs. time graph?

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Which two velocity vs. time graphs show the same acceleration?

• B & C

• A & C

• A & D

• B & D

• I don't know

What is the acceleration vs. time graph that corresponds to this position vs time graph?

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What’s the acceleration of a 10 kg object when it is subject to a gravitational force of 98 N?

• 0.1 m/s^2

• 88 m/s^2

• 980 m/s^2

• 9.8 m/s^2

• I don't know

An object accelerates at a rate of 50 m/s^2 from a force of 20 N. What is its mass?

• 0.4 kg

• 1000 kg

• 2.5 kg

• 30 kg

• I don't know

This picture shows a motorcyclist using his brakes to slow down. Which of these force diagram shows all the forces acting on him?

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This car just drove off a cliff, and the only force acting on it is gravity. What direction is this car’s acceleration?

• positive x-direction

• negative x-direction

• positive y-direction

• negative y-direction

• I don't know