A security camera, taking pictures each half a second, films a
cyclist going by. In the film, the cyclist appears to go forward
while the wheels appear to go backwards. Why?
How far have these students walked by the time the teacher's car
reaches them after their bus broke down?
A train leaves on time. After it has gone 8 miles (at 33mph) the driver looks at his watch and sees that the hour hand is exactly over the minute hand. When did the train leave the station?
Two trains set off at the same time from each end of a single
straight railway line which is 100 km long.
The first train travels at a constant speed of 55 km/h. The
second train travels at a constant speed of 70 km/h.
A very fast bee, Sidney travels at 100 km/h. Sidney starts off
in front of the first train and flies continuously back and forth
between the two trains.
How far does Sidney fly before he is squashed between the two
How could you alter the problem so that Sidney flies exactly 100