Question

car moves 30km in 0.5h and next 30km in2/3h.calculate the average speed for the entire trip in ms-1

Answer 1

Answer:

Average speed =total distance / total time

➡ Average speed =30 + 30 / 0.5  +2 / 3

➡ Average speed =60 / 1.17

➡Average speed =51.28 km/h

I HOPE IT IS HELPFUL TO YOU :-)

Answer 2

Answer:

Firstly, the car moves 30 km in 1/2 an hour. Thus it travelled at a speed of 60 km/h.

Converting that to m/s, we get 50/3 m/s.

Next it travelled 30 km more in 2/3 hours. Thus, it travelled at a speed of 45 km/h

Converting that to m/s, we get 12.5 m/s.

The avg. speed will be:

$\frac{ \frac{50}{3} + \frac{25}{2} }{2}$

$= ( \frac{100 + 75}{6} )( \frac{1}{2} )$

$= \frac{175}{12}$

$= 14.583 \: {ms}^{ - 1}$

Hope this helps.

Thanks.