Class 9 Motion Important Questions with answer

    Class 9 Motion Important Questions with answer  

1. The numerical ratio of displacement to distance for a moving object is
   (a) always less than 1
   (b) always equal to 1
   (c) always more than 1
   (d) equal or less than 1

2. if the displacement of an object is proportional to square of time, then the object moves with
   (a) uniform velocity
   (b) uniform acceleration
   (c) increasing acceleration
   (d) decreasing acceleration

3. Which of the following situations is possible?
   (a) An object can have acceleration, but constant velocity.
   (b) The velocity of an object may be zero but acceleration is not zero.
   (c) Distance and the magnitude of displacement are equal in circular motion.
   (d) Average speed and the magnitude of average velocity are always equal in circular motion.

4. The ratio of speed to the magnitude of velocity when the body is moving in one direction is
   (a) Less than one
   (b) Greater than one
   (c) Equal to one
   (d) Greater than or equal to one

5. From the given υ – t graph, it can be inferred that the object is

   
   

   
   
   
   (a) in uniform motion
   (b) at rest
   (c) in non-uniform motion
   (d) moving with uniform acceleration

6. Slope of a velocity-time graph gives
   (a) the distance
   (b) the displacement
   (c) the acceleration
   (d) the speed

7. A boy goes from A to B with a velocity of 20 m/min and comes back from B to A with a velocity of 30 m/min. The average velocity of the boy during the whole journey is
   (a) 24 m/min
   (b) 25 m/s
   (c) Zero
   (d) 20 m/min

8. What is motion ?

   An object might seem to be moving for one person and stationary for a few different. For the passengers in a very moving bus, the wayside trees seem to be moving backwards. A person standing on the road–side perceives the bus along with the passengers as moving

9. What is uniform motion ?

   As the object covers equal distances in equal intervals of your time, it's aforementioned to be in uniform motion.

10. What is non uniform motion

    where objects cover unequal distances in equal intervals of time, as an example, once a automobile is moving on a crowded street or an individual is cardiopulmonary exercise in a park.

11. What is average velocity

    The average speed of associate object is obtained by dividing the overall distance traveled by the overall time taken. T     

12. Distinguish between speed and velocity     

13. Speed is  rate of change of  distance	Velocity is direction &  it is the rate of change of position of an object.
    Speed is distance traveled by a object in a  unit time.	Velocity is displacement covered by a object in a unit time.
    Speed :  scalar quantity	Velocity: vector quantity.
    Speed: how fast a object moves.	Velocity: the object’s speed and the direction it takes while moving.

    
    

14. What is acceleration?

    which could be a live of the change within the speed of Associate in Nursing object per unit time. T , The acceleration is taken to be positive if it's within the direction of speed and negative once it's opposite to the direction of speed. The SI unit of acceleration is  m s–2 .

15. What is equation motion?

    When an object moves on a line with uniform acceleration, it's doable torelate its speed, acceleration throughout motion and the distance lined by it in a very bound time interval by a group of equations called the equations of motion. T

16. What is Uniform circular motion?

    If an  object moves during a circular path with uniform speed, its motion is termed uniform circular motion.

17. Draw a graphical method and name of the graph

    Velocity  2,4,6,8,10

    Time   3,5,7,9,11  

17. Draw a graphical method and name of the graph

Acceleration   10, 15,20, 30,45

Time   2,4,5,6,8,12