Test-Inv1.Exp2

As your friend skateboards down a hill, you measure their velocity. You record the following data: {(0.00 s, 0.55 m/s), (1.00 s, 1.80 m/s), (2.00 s, 3.05 m/s)}. Determine your friend’s acceleration.

As your friend skateboards down a hill, you measure their velocity. You record the following data: {(0.0 s, 0.0 m/s), (1.0 s, 2.3 m/s), (2.0 s, 4.6 m/s)}. Determine your friend’s acceleration.

At t=0 s, an object speeds up to 10. m/s for ten seconds. It continues at that speed, until at t=30. s, when the object begins to slow down with a constant acceleration. It comes to a complete stop at t=50. s. What is the object’s displacement at 50.0 s?

At t=0 s, an object speeds up to 10. m/s for ten seconds. It continues at that speed, until at t=30. s, when the object begins to slow down with a constant acceleration. It comes to a complete stop at t=50. s. What is the object’s acceleration when slowing down?

1. You are driving at 14 m/s when you suddenly slam on the brakes to avoid a collision. You come to a complete stop. When you stop, your acceleration is determined by your tires and the road conditions, and it is a constant –8.2 m/s^2. How many seconds did it take to stop the car?

What is instantaneous velocity?

• The average speed of an object over time
• The velocity of an object at a specific moment in time
• The total distance traveled divided by time
• The speed of an object in a circular path

How does the slope of the tangent line change on a position vs. time graph?

• It remains constant
• It varies with time
• It is always zero
• It is always increasing

What does the slope of the velocity vs. time graph represent?

• Displacement
• Velocity
• Acceleration
• Time

What does the equation vf = v0 + at describe?

• the velocity of an object under constant acceleration
• the aceceleration of an object under constant velocity
• the velocity of an object under constant speed
• the speed of an object under constant acceleration

What does the area under a velocity vs. time graph represent?

• a. Velocity
• b. Acceleration
• c. Displacement
• d. Time