# Speed

#### Students’ Learning Outcomes

·         Define speed and give its relation with distance.

#### Information for Teachers

·         Speed involves two things: distance covered the duration of time.
·         Distance covered in unit time is called speed.
·         A fast speed objects covers a specified distance in less than a slow speed object.

Material / Resources

Two tennis balls, chalk, textbook

#### Worm up activity

·         When you were walking in the street, a cyclist passed by you. Who is faster, you or the cyclist?
·         Then ask have you ever seen the speedometer of a motor bike or a car?
·         Inform them that the speedometers are used to measure the speed.
·         Inform the students: when you come to school, you cover some distance between your home and school. Then ask:
·         How do you cover this distance?
(Students’ response: on foot, on bicycle, car or bus). How long does it take you to cover this distance?
·         How can you cover this distance faster? By travailing on bicycle, car or on foot?
(Inform them: a fast speed object covers the specified distance in less time)

#### Activity 1

·         Ask two students to go from one end of the classroom to the other.
·         Ask one student to cover this distance by walking and the other by running.
·         Ask: who reached first? And why?
·         Draw their attention to the fact that the greater the speed of object the shorter is the time taken to cover a certain distance.

#### Activity 2

·         Mark two lines on the floor, one is the starting line and the other is the finishing line.
·         Place two tennis balls A and B side by side on the starting line.
·         Then ask a student to push both the balls towards the finishing line with the different forces.
·         After this demonstration, ask the students: which ball reached the finishing line earlier?
·         Which ball moved faster?
·         Draw out the conclusion that an object with greater speed covers a certain distance in shorter time.
·         Repeat the activity with different pairs of students.

#### Activity 3

·         Take your students to a playground.
·         Ask two students to start running in the same direction at the first clap and stop running at the second of clap.
·         Then ask: which student covered a longer distance in the same time?
·         Which student ran faster?
(Students’ response: A high speed object covers a longer distance in a certain time.

#### Sum up / conclusion

Ask the students: What we have learn t from today’s lesson? And write on the board the following conclusions from students’ answers.
·         The distance is measured by measuring length between the specific points.
·         A faster object covers a specified distance in less time than a slow speed object.
·         A faster object covers a longer distance in less time as compared to a slow one.

#### Assessment

·         Teacher will show some pictures (or cut outs) as given below to the students and ask the following questions:
·         Look at the picture below, which item is the fastest and which is slowest?
·         In the block given below, put the number of suitable pictures.