Speed, Velocity & Acceleration Quiz | Class 9 Science MCQs

Quiz: Speed, Velocity & Acceleration

1. What is the SI unit of speed?

m/s km s m

2. Which of these is a vector quantity?

Speed Distance Velocity Mass

3. What does acceleration measure?

Rate of change of velocity Rate of change of distance Total speed Time

4. Which of the following is correct if a car moves at constant velocity?

Its speed is zero It has zero acceleration It is accelerating It is changing direction

5. If a car speeds up from 10 m/s to 30 m/s in 5 seconds, what is its acceleration?

2 m/s² 4 m/s² 6 m/s² 8 m/s²

6. Velocity includes:

Only speed Speed and time Speed and direction Time and direction

7. A body is accelerating if:

Its speed remains the same It is at rest Its velocity changes It moves in a straight line

8. Which of the following does NOT affect speed?

Distance Time Direction Displacement

9. Uniform acceleration means:

Acceleration increases Constant acceleration No acceleration Changing velocity randomly

10. The correct relation is:

Speed = Distance × Time Distance = Speed ÷ Time Speed = Distance ÷ Time Time = Distance × Speed