Motion

Test Description: Motion, plate tectonics, and acceleration

Instructions: Answer all questions to get your test result.

1) It can be important to know the velocity of an object, not just its speed, because

2) The trunk of a certain tree is 70 cm thick. Each year it gets thicker by 1 cm. How thick will the tree trunk be in 50 years?

3) A rider finishes a 150-km bicycle trip in 3 hours. The average speed of the rider is

4) A car traveling at 20 m/s speeds up to 45 m/s over a period of 25 seconds. The average acceleration of the car is

5) How many centimeters are in a kilometer?

6) An airplane that moves 50 meters in one second has a speed of

7) Measurements of acceleration are given in units of

8) Speed measurements are given in units of

9) A runner starts a 5-km race at 10:15 am and finishes at 10:35 am. Given this information, you can calculate the runner's

10) An airplane flies 70 km in 10 minutes and then flies 110 km in 20 minutes. The average speed of the airplane is

11) An object is in motion if it is moving relative to a

12) To calculate the acceleration of an object moving in a straight line, divide the change in ______________ by the time during which the acceleration occurs.

13) The velocity of an object gives both its speed and _______________________.

14) You can calculate an _________ ______________ if you know both the TOTAL DISTANCE and the TOTAL TIME of a trip.

15) An object cannot be accelerating if it has a constant speed

16) The information needed for describing VELOCITY is distance, time, and direction

17) To determine the speed of an object, divide distance by acceleration

18) An object is in motion only if its distance from a reference point is stationary


*select an answer for all questions

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