Question

St.James Academy CBSE
Class 9
Question Bank - Chapter 8 - Motion
Sample Paper-1
(a) Identify the kind of motion in the following cases:
(i) A car moving with constant speed turning around a curve.
(ii) An electron Irbiting around nucleus.
(b) An artificial satellite is moving in a circular orbit of radius 36,000 km.
Calculate its speed if it takes 24 hours to revolve around the earth.
2. (a) Define average speed.
(b) A bus travels a distance of 120 km with a speed of 40 km/h and returns
with a speed of 30 km/h. Calculate the average speed for the entire joumey.
3. Define uniform and non-uniform motion. Write one example for each.
4. What does the odometer of an automobile measure? Which of the following is
moving faster? Justify your answer.
(1) A scooter moving with a speed of 300 m per 1 minute.
(ii) A car moving with a speed of 36 km per hour.
5. A car travels from stop A to stop B with a speed of 30 km/h and then returns
back to A with a speed of 50 km/h. Find
(i) displacement of the car.
(ii) distance travelled by the car.
(iii) average speed of the car.
6. Velocity-time graph for the motion of an object in a straight path is a straight
line parallel to the time axis.
(a) Identify the nature of motion of the body.
(b) Find the acceleration of the body.
I Draw the shape of distance-time graph for this type of motion
7. Draw the shape of the distance-time graph for uniform and non-uniform motion
of object. A bus of starting from rest moves with uniform acceleration of 0.1 ms
2 for 2 minutes. Find
(a) the speed acquired.
(b) the distance travelled.
8. (a) Define uniform acceleration. What is the acceleration of a body moving
with uniform velocity?
(b) A particle moves over three quarters of a circle of radius r. What is the
magnitude of its displacement?
9. A bus accelerates uniformly from 54 km/h to 72 km/h in 10 seconds Calculate
(i) acceleration in m/s2
(ii) distance covered by the bus in metres during this interval.​

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