CBSE Class 9 Science Describing Motion Around Us (Class 9 NCERT New) Quiz 8

1. David walks 3 km north, and then turns east and walks 4 km. What is the distance?

A 7 km B 3 km C 4 km D 1 km

2. Which equation will you use if you are given the values of u, v and a to find distance?

A First eq of motion B Second eq of motion C Third eq Motion D Insufficient data

3. A particle is moving in a circular path of radius r. The displacement after half circle will be

A r B 2r C zero D 2.ƛ r

4. Which of the following is most likely not a case of uniform circular motion?

A (a) Motion of the earth around the sun B (b) Motion of a toy train on a circular track C (c) Motion of a racing car on a circular track D (d) Motion of hours’ hand on the dial of a clock

5. Which of the following figures correctly represents uniform motion of a moving object?

A a B b C c D d

6. Which one of the following graphs shows the object to be stationary?

A a B b C c D d

7. A worker covers a distance of 40 km from his house to his place of work, and 10 km towards his house back. Then the displacement covered by the worker in the whole trip is

A zero km B 10 km C 30 km D 50 km

8. Rate of change of displacement is called

A Speed B Deceleration C Acceleration D Velocity

9. SI Unit of measurement of acceleration is

A m/s B m/s2 C m/hr D M

10. Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:

A (a) At rest B (b) Moving with no acceleration C (c) In accelerated motion D (d) Moving with uniform velocity