Question

A toy train is going around a circular track of radius 1.2 m. The train takes 9 seconds to complete one lap of the circular track.

Calculate the speed of the train

Answer 1

The circumference of a circle is given by 2πr, where r is the radius of the circle. Therefore, the circumference of the circular track is:

C = 2π(1.2 m) = 2.4π m

The train completes one lap of the track in 9 seconds, so its speed is given by:

speed = distance / time

where distance is the circumference of the track and time is 9 seconds. Substituting the values, we get:

speed = 2.4π m / 9 s ≈ 0.84 m/s

Therefore, the speed of the toy train is approximately 0.84 m/s.