14. A car travels a certain distance with a speed of 50 km/h & returns with a speed of 40
km/h. Calculate (i) the average speed & (ii) average velocity of car for the whole
journey.
Answers
Answered by
2
Answer:
A car travels a certain distance with a speed of 50 km/h and returns with a speed of 40 km/h. Calculate the average speed for the whole journey. A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 ms-2, with what velocity will it strike the ground?
Answered by
1
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
Similar questions