Speed distance and time - Introduction

What does speed measure?

• The force applied to an object.

• The distance an object travels in a certain time.

• The acceleration of an object.

• The weight of an object.

Usain Bolt set a world record by running 100 meters in 9.58 seconds. What was his average speed?

• 9.58 m/s

• 10.00 m/s

• 10.44 m/s

• 100 m/s

Why is it necessary to convert units when comparing the speed of Usain Bolt (m/s) and a Formula 1 car (km/hr)?

• To make the numbers larger.

• To make the calculations more complex.

• To ensure the speeds are expressed in the same units for accurate comparison.

• To match the units used in the original question.

A person walked 5 Km at a speed of 3 Km/hr. How much time did it take him?

• 2 hr

• 10 Km

• 1.66 hr

• 3 km/hr

A car travels at a constant speed of 50 km/hr for 3 hours. How far does the car travel?

• 50 km

• 100 km

• 150 km

• 200 km