Question

The position - time graph of a particle moving along the X-axis is shown. Average speed of particle in. t =0 seconds to t = 20 seconds is

Answer 1

$\text{Average speed}=\frac{\text{Total distance}}{\text{Total time}}\\ =\frac{20+20}{20}=2 m/s$

Answer 2

Answer:

The average speed of the particle is 2 m/s.

(3) option is correct

Explanation:

According to diagram,

Total distance = 40 m

Total time = 20 sec

Average speed :

Average speed is equal to the total distance divided by the total time.

In mathematical term,

$v_{avg}=\dfrac{D}{T}$

Where, D = total distance

T = total time

Now put the value into the formula

$v_{avg}=\dfrac{40}{20}$

$v_{avg}=2\ m/s$

Hence, The average speed of the particle is 2 m/s.