• Example-01: Which of the following is true for displacement?
(a) It cannot be zero.
(b) Its magnitude is greater than the distance travelled by the object.

Example-02: Distinguish between speed and velocity.

Answer: Speed has only magnitude while velocity has both magnitude and direction.

Example-03: Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?

Answer: The magnitude of average velocity of an object will be equal to its average speed in the condition of uniform velocity.

Example-04: What does the odometer of an automobile measure?

Answer: In automobiles, odometer is used to measure the distance.

Example-05: What is the quantity which is measured by the area occupied below the velocity-time graph?

Answer: The quantity of distance is measured by the area occupied below the velocity time graph.

Example-06: What does the path of an object look like when it is in uniform motion?

Answer: In the case of uniform motion the path of an object will look like a straight line.

Example-07: When will you say a body is in
(i) uniform acceleration?
(ii) non-uniform acceleration?

(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time.

(ii) A body is said in non-uniform acceleration when its motion is along a straight line and its velocity changes by unequal magnitude in equal interval of time.

Example-08: What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

(a) The slope of the distance-time graph for an object in uniform motion is straight line.

(b) The slope of the distance-time graph for an object in non-uniform motion is not a straight line.

Example-09: What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?

Answer: When the slope of distance-time graph is a straight line parallel to time axis, the object is moving with uniform motion.

Example-10: What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?

Answer: When the slope of a speed time graph is a straight line parallel to the time axis, the object is moving with uniform speed.

Example-12: State which of the following situations are possible and give an example for each of these:

(a) An object with a constant acceleration but with zero velocity

(b) An object moving in a certain direction with an acceleration in the perpendicular direction.