DIGITAL LESSON PLAN
SUBJECT: SCIENCE
CLASS: IX
LESSON: MOTION
CONCEPT: Motion along a straight line. (Distance and Displacement)
INTRODUCTION:
1. A body is said to be in motion if it changes its position with respect to
a given fixed point.
2. Motion is a relative term.
3. Scalar and vector quantity.
POINT WISE EXPLANATION
1. The length of the actual path covered by an object is called distance.
2. A device to measure the distance travelled is odometer.
3. The shortest distance between initial position and final position of a
moving object in the given interval of time is displacement.
4. Displacement can be zero but distance can never be zero.
5. Distance is a scalar quantity but displacement is vector quantity.
6. SI unit of distance and displacement is meter.
SUPPORT MATERIAL
ACTIVITY
Activity will be performed by active participation of students to understand
the concept of distance and displacement. MASTER CARD:
Important points on distance and displacement will be written on card separately and spread
on the table. One group of students will pick cards of displacement and another of distance.
IMAGES
CLIP ART REPRESENTATION OF MOTION
In this picture, the red line
illustrates displacement, whereas
distance is depicted by the blue
ray.
REFERENCE WEB LINKS
http://www.wiziq.com/tutorial/25274-Motion-in-a-straight-line
http://www.topperlearning.com/downloads/ncert/1284557342_Phy_IX_Motion_NCERTSolutions0.p
df
http://www.physicstutorials.org/index.php/home/mechanics/1d-kinematics/distance-anddisplacement
LEVEL WISE ASSIGNMENT
LEVEL ONE (LOW ACHEIVERS)
1. What is the SI unit of distance?
2. If the displacement of a body is zero, is the distance covered by it
necessary be zero?
3. Odometer measures _______________.
LEVEL TWO (AVERAGE PERFORMER)
1. Displacement is a ____________ quantity.
2. Can the displacement be greater than distance travelled by an object?
3. What is distance? How is it different from displacement?
LEVEL THREE (HIGH ACHEIVERS)
1. When can the distance and displacement of a moving object have the
same magnitude?
2. Give an example of the situation where displacement id zero but
distance travelled is not zero?
3. An athlete completes one round of a circular track of diameter 200m in
30s. Find:
i)
The distance travelled by the athlete.
ii)
The magnitude of displacement of the athlete at the end of 30s.
4. Find an example where object is at rest and also in motion at the same
time.
5. A person standing at A and goes to B by following any of the paths 1,
2 or 3. From which path we can calculate the displacement.
6. What will be the distance and displacement covered by Harry if he
moves 1m towards the north and then through 2 m towards
east.