Station 3 – 1 Dimensional Kinematics

______1.An auto manufacturer advertises that their car can go "from zero to sixty in eight seconds." This is a description of what characteristic of the car's motion?

  1. Average speed
  2. Distance
  3. Average acceleration
  4. Displacement

______2.Suppose that a car traveling to the east (+x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?

  1. Its acceleration is in the +x direction
  2. It’s acceleration is in the –x direction
  3. Its acceleration is zero
  4. Its acceleration is decreasing in magnitude as the car slows down.

______3.Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about is acceleration is correct?

  1. The acceleration is toward the east.
  2. Since the car is slowing down, its acceleration must be negative.
  3. The acceleration is zero.
  4. The acceleration is toward the west.
  1. A spaceship far from any star or planet accelerates uniformly from 72 m/s to 160 m/s in 10.0 s. How far does it move during this time? [hint: 2 part problem]
  1. A cannonball is launched from a cannon at a constant acceleration of 2.5 m/s2. If the cannon is 2 meters long, what is the velocity at discharge as it leaves the barrel?
  1. A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?
  1. A car initially traveling at 60 km/h accelerates at a constant rate of 2.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?
  1. A stone is thrown with an initial upward velocity of 7.0 m/s and experiences negligible air resistance. If we take upward as the positive direction, what is the velocity of the stone after 0.50 s?
  1. If your friend holds a ruler between your fingers and releases it without warning, how far in centimeters can you expect the ruler to fall before you catch it? Assume a reaction time of 0.1 seconds and that air resistance is negligible