Answer to Question #68555 in Physics for Ritwija

Question

8. An artificial satellite is moving in a circular orbit of radius 36,000 km. Calculate its speed if it
takes 24 hours to revolve around the earth.
9. A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30
km/h.
Calculate the average speed for the entire journey.
12. A particle moves over three quarters of a circle of radius r. What is the magnitude of its
displacement?
13. A bus accelerates uniformly from 54 km/h to 72 km/h in 10 seconds Calculate
(i) acceleration in m/s2
(ii) distance covered by the bus in meters during this interval.