Understanding Speed and Motion

• It is easy to decide which object has the highest speed

• An object which covers 100 meters in the shortest time has the highest speed

Speed

• Speed word is familiar

• A higher speed indicates that a given distance has been covered in less time, or a larger distance has been covered in a given time

• The most convenient way to find out which of the two or more objects is moving faster is to compare the distances moved by them in a unit time

• If the distance covered by two buses in one hour is known, then the faster one can be determined

• The distance covered by an object in a unit time is that object's speed

• A car moving with a speed of 50 kilometers per hour will cover a distance of 50 kilometers in one hour

• Cars seldom move at constant speed for one hour

• Cars usually start slowly and then pick up speed

• So, saying the car has a speed of 50 kilometers per hour refers to the total distance covered in one hour, regardless of variable speeds

• If a person covers less distance than the bus in 5 minutes, the bus can be considered to be moving faster than the person

• The faster vehicle has a higher speed

• In a 100-meter race, the faster vehicle has a higher speed

Learn how to determine which object is moving faster by comparing distances covered in a unit of time. Explore the concept of speed and how it relates to the distance covered. Understand how to calculate and compare the speeds of different objects.