Moving walkway speed
Someone walks, jogs or runs on an airport moving walkway, a toy robot walks on a conveyor belt, or a child walks along a moving train. The student finds how fast they go past the ground going each way, how many seconds it takes to cover the walkway, or their own speed from how fast they go on it.
Going the same way, the two speeds add; going the opposite way, the walkway's speed is taken away. On a train, walking towards the back still moves you forwards, just more slowly. Every length is set so the time comes out in whole seconds.
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What changes each time
- Walkways at 1 to 3 m/s, belts at 2 to 6 cm/s, trains at 15 to 30 m/s
- Same way, opposite way, or standing still
- Both speeds, the time to cross, or their own speed
More ratio, rates and percentages practice
- Equivalent fractions, percentages and ratios (Grade 4)
- Rate tables (Grade 4)
- Calculating speed (Grade 4)
- Calculating distance (Grade 4)
- Calculating travel time (Grade 4)
- Moving towards each other (Grade 5)
- Average speed there and back (Grade 5)
- Percentage of a grid (Grade 5)
- Work and time problems (Grade 5)