Speed, velocity and accelerationIB MYP Sciences: Mind map

Exam questions on Speed, velocity and acceleration

1. A cycling club in Nairobi times one of its riders over a straight 1200 m stretch of road. The rider takes 80 s to cover it.
   The rider keeps the same average speed. Calculate the distance she travels in 2.0 minutes.2 marks
2. A sports car on a test track in Dubai starts from rest and accelerates in a straight line, reaching 27 m/s after 6.0 s.
   A different car increases its velocity by 20 m/s with an acceleration of 2.5 m/s². Calculate the time this takes.2 marks
3. Aiko, a student in Osaka, investigates how the height of a ramp affects the speed of a toy car. She releases the car from rest at the top of the ramp and uses a stopwatch to time how long it takes to cross a 1.0 m flat track at the bottom. Each time is the mean of three runs. The mean times are 2.0 s for a ramp height of 5 cm, 1.4 s for 10 cm, 1.1 s for 15 cm and 1.0 s for 20 cm.
   State a testable hypothesis for this investigation, giving a scientific reason, and identify the dependent variable.3 marks