Question

Q3. Which of the following can sometimes be ‘zero’ for a moving body?
i)Average velocity, ii)Distance travelled, iii)Average speed, iv)Displacement
a. Only i)
b. i) and ii)
c. i) and iv)
d. Only iv)

Answer 1

Answer:

Answer C Markbrainliest....vectors(velocity,displacement) can be +,- , zero also.but scalars (speed,distance)are always +ve.

Answer 2

Answer

Option c) i) and iv)

$\rule{250}2$

i) Average velocity is defined as the total displacement with respect to total time taken.

ii) Distance travelled means total distance covered by the body in respective time.

iii) Average speed is defined as the total distance covered with respect to total time taken.

iv) Displacement is defined as the shortest path travelled by a body between the initial and final points.

We have to find that which of the above can be zero.

Let's take an example to understand this:

A car travels from A to B with some speed and return back using the same pathway.

Let us assume that the distance covered by the car is 'x' km.

Since the car starts from A to B, then returns to A point again. So, the distance covered by the car is twice of the distance i.e. 2x km. Also, the initial and final points of the car are same i.e. A point. So, the displacement or average velocity of the car is 0 km.

Let's take one more example to understand this:

Ram want to a market to buy some fruits. He starts from his house. Here, his house is the initial point from where he starts moving and market is the final destination or point where he want to reach.

Assume that, from his house to market he travelled a distance of 15 km. Now, after buying fruits he return backs to his house using the same pathway. Again the distance covered by him is the 15 km. So, the total distance covered by him is 30 km. Whereas, the Displacement covered by him (Ram) is 0 km. As his initial and final points are same (here initial and final point is his house).

Therefore, the average velocity and displacement of the moving object can be zero.