Question

Motion

4. A car covers first 50
km at a
unifo
velocity of 45 km/h and the next 50 at
90 km/h. ind the average velocity of
the car.

Answer 1

Solution AVG velocity is total displacement / total time so calculate time which is given by displacement / velocity

Answer 2

For the first 50km
velocity given 45km/hr
time =50/45=10/9 hr
For the second 50km
velocity given 90km/hr
time=50/90=5/9hr
Total time=10/9+5/9 hr=15/9hr
Total Distance=50+50=100km
Average Velocity=100/15/9km/hr=60km/hr