Question

Physics.
points.

A lady starts from Home at 10 o clock, reaches office at a distance of 5km on auto, with speed 20 km/h.She stays in th office upto 5'o clock and returns home walking at speed 10km/h. Draw displacement time graph for the lady.​

Answer 1

$\huge \boxed{ \boxed{ \bf{Answer}}}$


Diagram refer to the attachment.


$\bf \underline{ \underline{Explanation}} :$


Let, the starting point of the lady be A.

While going she took auto and the distance travelled by auto is 5km at 20km/h. So, let's find the time taken by her.


✨ Forward Journey -

v = 20 km/h

s = 5 km/h

$\therefore \: speed \: = \: \frac{distance}{time}$

$t \: = \frac{d}{v}$

$t \: = \: \frac{5}{20}$

$t = \frac{1}{4} \: (hr)$

$t \: = \: 15 \: min$

So, in 15 min. the lady reached her office.


She remains at office upto 5'o clock, so there was no displacement i.e from 'B' to 'C'.

After that she returns her home by walking at the speed of 10 km/h.


So, now let's find the time taken by her while reaching home.

✨ Return Journey -

v = 10 km/h

s = 5 km/h

$time \: = \frac{distance}{speed}$

$t = \frac{5}{10}$

$t \: = \frac{1}{2} (hr)$

$t = 30 \: min$


So, time taken by her to return her home 'D' is 30 min.

Answer 2

Answer:

Step-by-step explanation:

Let, the starting point of the lady be A.

While going she took auto and the distance travelled by auto is 5km at 20km/h. So, let's find the time taken by her.

✨ Forward Journey -

v = 20 km/h

s = 5 km/h

So, in 15 min. the lady reached her office.

She remains at office upto 5'o clock, so there was no displacement i.e from 'B' to 'C'.

After that she returns her home by walking at the speed of 10 km/h.

So, now let's find the time taken by her while reaching home.

✨ Return Journey -

v = 10 km/h

s = 5 km/h

So, time taken by her to return her home 'D' is 30 min