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Science Library Quiz

Kinematics

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 man can accelerate at 5 m/s2, and has a top speed of 10 m/s. A bicycle can accelerate at 2.0 m/s2 and has a top speed of 18 m/s. If they start together, the bicycle will overtake the man:




Question 2: A car accelerates at 36 km/h/s. After two seconds it is travelling at a velocity of:




Question 3: A parachutist a) freefalls from an aeroplane, b) reaches terminal velocity for a while, then c) opens his parachute.
If upwards is positive, what is his acceleration in the three phases?
Parachute opening




Question 4: With constant acceleration, the acceleration is best described as ....... the velocity-time curve.




Question 5: With non-constant acceleration, the acceleration is ....... the velocity-time curve.




Question 6: With constant acceleration, what is the shape of the displacement graph?





Question 7: A mass is moving at 150 m $s^{-1}$ and accelerates at -10 m $s^{-2}$. After how long will it be back at its starting position?




Question 8: A car is travelling at 12.0 m $s^{-1}$ along a straight road. The driver applies the brakes for 2.4 seconds, and the speed reduces to 4.8 m $s^{-1}$. What is the average acceleration?






Question 9: An aeroplane accelerates down a runway which is 800m long. It needs to reach take-off speed of 480 km $h^{-1}$. What acceleration does it need to achieve?




Question 10: A car accelerates from 6 $m/s$ to 24 $m/s$ in 5.5 s. What distance does it travel in this time?




Question 11: A body starts at the origin with a velocity of -6.2 $m s^{-1}$, and an acceleration of 1.8 $m s^{-2}$. Where will it be after 4 seconds?







Question 12: A body starts at an arbitrary origin with a velocity of -6.2 $m s^{-1}$, and an acceleration of 1.8 $m s^{-2}$. How far will it travel before it is back at the origin?





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