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Science Library Quiz

Acceleration

Instructions: answer the questions, check them carefully, and when you are sure they are all right, press submit. The number of correct answers will be displayed.

Question 1: A skier slides down a skislope. After 10 seconds he is travelling at 15 m/s. What is his average acceleration if he starts with zero velocity? Skier




Question 2: A cyclist speeds up from 5.0 m/s to 12 m/s over 7 seconds. What is his average acceleration?




Question 3: A falling object accelerates at 9.8 m/s2 if we ignore air resistance. How fast is an apple going after 3 seconds when we drop it out of a window?




Question 4: A girl on a bicycle travelling at 6 m/s speeds up at 1.5 m/s2. A car starts at traffic lights and accelerates at 3.0 m/s2. How long does it take the car to reach the girl's velocity? Cyclists in traffic





Question 5: A boy on a skateboard accelerates from zero to 9.0 m/s at 1.5 m/s2. He maintains this speed for 8.0 seconds. He then decelerates to zero in 4.0 seconds. Draw a graph of his velocity against time. From this, calculate how far has he travelled in total.




Question 6: Felix Baumgartner made history when he jumped and fell 39 km towards the Earth on 14 October, 2012. When his parachute opened after 4 minutes and 19 seconds, he was travelling at 1,358 km/h. What was his average acceleration during the fall? Felix Baumgartner




Question 7: A cyclist is riding at 10 m/s, and sees he must stop at traffic lights 50m away. What is his average acceleration?






Question 8: A rocket takes off and accelerates evenly for 4 minutes. If its final velocity is 1200 km/h, what was its acceleration? Soyuz rocket




Question 9: In this graph of velocity against time, in which section was the acceleration the greatest? Graph of velocity/time





Question 10: In the above situation, a car wants to get between two traffic lights as quickly as possible. It accelerates evenly to its top speed of 20 m/s, then immediately decelerates at the same rate till it stops at the next traffic lights. If the distance between the traffic lights is 100m, how long does it take? Animation of car at traffic lights





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