Measuring instantaneous speed practical (v=s/t) | Combined science

Starter quiz

Izzy rode her bike for 3 hours and travelled 45 kilometres. What was her average speed?
- 10 km/h
- 15 km/h ✓
- 20 km/h
- 25 km/h
Lucas rides his bike for 4 hours with an average speed of 15 km/h. He travelled at a speed of 10 km/h for the first two hours. What speed must he have been travelling at for the last two hours?
- 10 km/h
- between 10 km/h and 15 km/h
- 15 km/h
- higher than 15 km/h ✓
Which of the graphs shows an object moving with increasing speed (accelerating)?
Andeep ran 20 metres in 5 seconds then slowed down and walked 5 metres in the next 5 seconds. What was his average speed for the first 5 seconds?
- 1 m/s
- 2.5 m/s
- 4 m/s ✓
- 5 m/s
Andeep ran 20 metres in 5 seconds then slowed down and walked 5 metres in the next 5 seconds. What was his average speed for the whole 10 seconds?
- 1 m/s
- 2.5 m/s ✓
- 4 m/s
- 5 m/s
Aisha cycles to school three days in a row. Her speeds are shown on the bar chart. What is her average speed for the journey to school?
- 2.0 m/s
- 3.7 m/s ✓
- 4.0 m/s
- 5.0 m/s