MOTION-1

A car travels 250 km in five hours. Its average speed is ... km/hour

What is the average speed of an athlete who runs 1200 m in 4 minutes? State your answer in meter/second.

What is the average speed of a car that travels 400 m in 20 s? State your answer in m/s.

A train increases its speed steadily from 10 m/s to 20 m/s in 1 minute. How far does it travel while increasing its speed? State your answer in meters.

A motorcyclist starts from rest and reaches a speed of 6 m/s after travelling with constant acceleration for 3 s. His acceleration is ... m/s².

An aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircrafts altitude, how long will it take to reach the sound barrier? State your answer in seconds.

The distance of a walker from the start of her walk is given below at successive intervals of 1 second. How would you describe the speed at which she walks?

• Constant

• Changing

• Increasing

• Decreasing

Calculate the person's average speed which him distance from the start of his walk is given in that tabel. State your answer in m/s.

Calculate its average speed from its graph.

Based on the graph, is the object approaching or moving away from observer?

• approaching

• moving away