Motion graphsIB MYP Physics: Flashcards

Exam questions on Motion graphs

1. A cyclist in Amsterdam rides along a straight cycle path. Her speed increases uniformly from 0 to 8 m/s in 4 s. She then rides at a constant 8 m/s for 10 s, before slowing down uniformly to rest in 6 s. A student draws a speed-time graph of her ride.
   State what the graph shows about her motion between 4 s and 14 s and explain how you can tell.2 marks
2. A student in Doha walks along a straight road. She walks 120 m away from home in 80 s at a steady speed. She then stops at a friend's house for 40 s. She then walks a further 180 m in 90 s at a steady speed. A distance-time graph is drawn of her walk.
   Calculate her speed in the first part of the walk and use it to explain which of the two walking sections of the graph is steeper.2 marks
3. A lorry sets off from rest on a straight, flat road in Nairobi. Its speed increases uniformly to 12 m/s in 6 s, and then stays constant at 12 m/s for a further 20 s. A speed-time graph is drawn of the lorry's journey.
   Calculate the distance the lorry travels in the first 6 s.3 marks