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Revision Questions

1. The document provides a set of revision questions on the topic of motion for a grade 9 physics exam. It covers key concepts such as velocity, acceleration, uniform and non-uniform motion, distance versus displacement, and analyzing graphs of distance, speed, and velocity over time. 2. Students are asked to define important terms, distinguish between related concepts, calculate values like average speed and acceleration from scenarios and graphs, and identify examples that illustrate various types of motion. 3. The document emphasizes practicing numerical problems involving distance-time and velocity-time graphs to assess understanding of straight-line motion concepts.

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Priya Suresh Kumar
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448 views3 pages

Revision Questions

1. The document provides a set of revision questions on the topic of motion for a grade 9 physics exam. It covers key concepts such as velocity, acceleration, uniform and non-uniform motion, distance versus displacement, and analyzing graphs of distance, speed, and velocity over time. 2. Students are asked to define important terms, distinguish between related concepts, calculate values like average speed and acceleration from scenarios and graphs, and identify examples that illustrate various types of motion. 3. The document emphasizes practicing numerical problems involving distance-time and velocity-time graphs to assess understanding of straight-line motion concepts.

Uploaded by

Priya Suresh Kumar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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SSVM INSTITUTIONS

Physics grade IX - Revision questions


Motion
1. Define velocity and state its SI unit. For motion along a straight line, when
do we consider the acceleration to be (i) positive (ii) negative? Give an example
of a body in uniform acceleration.
2. Find the total displacement of the body from the following graph:

Also find acceleration from


a) B to C
B) A to B
c) D to E

3. A car travels at 54 km/h for first 20 s, 36 km/h for next 30 s and finally 18
km/h for next 10 s. Find its average speed.

4. Define acceleration and give its SI unit. When is acceleration of a body


negative? Give two examples of situations in which acceleration of the body is
negative.

5. Distinguish between uniform motion and non uniform motion. Is uniformly


accelerated motion a uniform motion? Give one example each of uniform and
non-uniform motion.

6. The speedometer readings of a car are shown below. Find the acceleration of
the car and its displacement.
Time Speedometer
9:25 am 36 km/h
9:45 am 72 km/h

7.Distinguish distance and displacement


8.Calculate the distance travelled and displacement from A to F
9.Calculate the distance travelled and displacement from
a) A to C
b) A to A

10.Johny completes the bicycle ride with the final velocity of 10 ms-1 and
acceleration 2 ms-2 within 3s. Calculate the initial velocity.

11.A truck travelling at 54 km/h is slow down to 36 km/h in 10 sec. Find the
retardation
12a].A scooter speeds down to 20 m/s in 4 sec to rest . Find the acceleration of
scooter.
b].A train starting from a railway station and moving with uniform acceleration
attains a speed 40 km/hr in 10 minutes. Find its acceleration.

Concepts to be covered

• Concept of straight line motion

• Study the difference between distance and displacement.

• Which of the following is true for displacement?

(a) It cannot be zero.

(b) Its magnitude is greater than the distance travelled by the object.

• Practice the numerical on distance-time concept

• Concept of acceleration with examples


• Concept of uniform and non-uniform acceleration and graphical
representation for both

•
• Shapes of graphs for uniform and non-uniform speed and velocity

• How you can determine the distance moved by a car from its velocity-time
graph.

• Have a good command over example and exercise problems.

• Practice the Velocity-time graph for different acceleration

• What is the quantity which is measured by the area occupied below the
velocity-time graph?

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