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Practice Quiz: Linear Motion *You may use a calculator and your equation sheet ONLY on this quiz.*Part I: Multiple ChoiceDirections: Write the letter of the correct answer on the line provided._________________1.Speed is a.a measure of how fast something is moving.b.the distance covered per unit time.c.always measured in terms of a unit of distance divided by a unit of time. d.all of the above_________________2.One possible unit of speed is a.Kilometers per hourb.Meters per second squaredc.Light yearsd.Miles per hour per second_________________3.When you look at the speedometer in a moving car, you can see the car’s a.instantaneous speed.b.average speed.c.instantaneous acceleration.d.average acceleration._________________4.Suppose you take a trip that covers 240 km and takes 4 hours. Your average speed is a.480 km/hrb.240 km/hrc.120 km/hrd.60 km/hr_________________5.A ball is thrown straight up. At the top of its path its acceleration is a.about -5 m/s2.b.about -10 m/s2.c.about -w20 m/s2. d.0 m/s2Part II: Free ResponseDirections: Answer the following questions. Write the correct answer in the box. Be sure to include UNITS in all of your answers. Show ALL work.6. The fastest helicopter, the Westland Lynx, can travel 33,300 m in the forward direction in just 30.0 s. What is the average velocity of this helicopter?7. The flight speed of a small bottle rocket can vary greatly, depending on how well its powder burns. Suppose a rocket is launched from rest so it travels 12.4 m upward in 2.0 s. What is the rocket’s acceleration?8. A crate is carried by a conveyor belt to a loading dock. The belt speed uniformly increases slightly, so that for 28.0 s the crate accelerates by 0.035 m/s2. If the crate’s initial speed is 0.76 m/s, what is its final speed?9. Luke Autbeloe drops a pile of roof shingles from the top of a roof located 8.52 meters above the ground. Determine the time required for the shingles to reach the ground.10. Rex Things throws his mother's crystal vase vertically upwards with an initial velocity of 26.2 m/s. Determine the height to which the vase will rise above its initial height.11. James Bond’s helicopter can travel 27.750 m in the forward direction in just 39.64 s. What is the average velocity of his helicopter?12. Steven is waiting at a stoplight in his BMW. When it finally turns green, he accelerates from rest at a rate of 2.00 m/s2 for a time of 4 seconds. Determine the displacement of Steven’s BMW during this time period.13. Alexis is running laps around the track for exercise. She is initially moving at 0.5 m/s and accelerates at a rate of 0.75 m/s2 for 5 seconds. What is Alexis’s velocity after the 5 seconds?14. A gummy bear is released from rest at the top of the Performing Arts Center at Lawndale High School, which is 412 m tall. Disregarding air resistance, calculate the height of the gummy bear after 4 seconds.15. Evelyn throws an eraser straight up into the air with a speed of 50 m/s. The eraser is in the air for a total of 10 seconds before it is caught in its original position. How high does the eraser rise? ................
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