Question

Hlw guys gd mrng ..Plzzz solve 10 no. it's very urgent it's gave 50 points​

Answer 1

Distance = 180 m

Displacement = 0 (returned to initial position)

time taken 60 s

Avg speed = total distance/total time

= 180/60

=3 m/s

avg velocity = displacement/ time

=0/60

=0m/s

Hope it help u.....

Answer 2

10)

Length of pool = 90 m.

Name of the swimmer = Usha

Where she swims? = Long pool of 90 m.

She covers 180 m in 1 min.

She covers 90 m in 1/2 min.

Average speed, is the ratio of total distance travelled to the total time taken to cover that distance.

So average speed can be given as :

$\frac{180 \: metres}{1 \: minute}$

= $\frac{180 \: metres}{60 \: seconds}$

= 3 m/s.

Now, average velocity, is the ratio of total displacement travelled to the total time taken to cover that distance.

So average velocity can be given as :

$\frac{0\: metre}{1 \: min}$

$= \frac{0 \: metre}{60 \: seonds}$

= 0 metre/second