Question

0.23) What is free fall.
A Car travels at a speed of 50 km/h for 30 min. at 30 km/h for the
next 15 min. and then at 70 km/h for the next 45 min. What is
the average speed of the car
​

Answer 1

Answer:

Free motion only under gravitational force calls free fall.

56.67 km/hr

Explanation:

First find total distance

$d = 50 \times \frac{1}{2} + 30 \times \frac{1}{4} + 70 \times \frac{3}{4} = 85km$

Total time

$t = \frac{1}{2} + \frac{1}{4} + \frac{3}{4} = \frac{3}{2}$

So average Velocity

$v = \frac{d}{t} = \frac{85}{( \frac{3}{2} )} = 56.67 \: kmph$