CBSE Class 9 Science Describing Motion Around Us (Class 9 NCERT New) Quiz 4

1. Which statement is always true?

A Distance is equal to displacement B Distance is less than displacement C Distance is greater than or equal to displacement D Displacement is always positive

2. If the velocity-time graph is a straight line parallel to the time axis, the object is:

A Accelerating uniformly B Moving with constant velocity C At rest only D Moving with decreasing speed

3. Which graph corresponds to uniformly accelerated motion?

A Curved distance-time graph with irregular shape B Straight velocity-time graph with constant slope C Horizontal velocity-time graph D Horizontal acceleration-time graph at zero

4. During motion in a straight line, if an object reverses its direction, then:

A Distance decreases B Displacement may decrease C Speed becomes negative D Time becomes zero

5. Which statement best describes acceleration?

A Rate of change of position B Rate of change of velocity C Rate of change of distance D Rate of change of mass

6. An object can have:

A Zero speed and non-zero velocity B Non-zero speed and zero velocity C Zero displacement and non-zero distance D Zero distance and non-zero displacement

7. A curved line on a distance-time graph indicates:

A Uniform motion B Non-uniform motion C No motion D Constant velocity

8. In which case is acceleration definitely non-zero?

A An object moving with constant speed in a circle B An object at rest C An object moving in a straight line with constant velocity D An object with zero displacement

9. You hear that a storm is moving 15km/h north. You have been given the storm's _____________.

A constant speed B acceleration C velocity D average speed

10. A measure of the distance an object travels in a unit of time.

A meters per second B velocity C motion D speed