Question

A car travels a certain distance with a speed of 50 km/ h & returns with a s peed of 40 km/ h. Calculate (i) the average speed & (ii) average velocity of car for the whole journey.

Answer 1

Answer:

To complete 1km distance with speed =50kmhr it tkes time t

1

=

50

1

s

To complete 1km distance with speed =40kmhr it tkes time t

1

=

40

1

s

Average speed=

(1/50)+(1/40)

1+1

=44.44m/s