# 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?

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?