7. (a) Which of the three is travelling the fastest? (b) Are all three ever at the same point on the road? (c) How far has C travelled when B passes A? (d) How far has B traveled by the time-it-passes-C?-- A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m 52, with what velocity will it strike the ground? After what time will it strike the 8. The speed-time graph for a car is shown is Fig. 8.12. ground? 8 6 Speed (m 8') 4 2 6 8 10 126 ST 2 4 6 Time (s) 319 Fig. 8.12 (a) Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car? 9. State which of the following situations are possible and give an example for each of these: (a) an object with a constant acceleration but with zero velocity (b) an object moving in a certain direction with an acceleration in the perpendicular direction. 10. An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
Answers
Answer:
"In ancient times, a king had his men place a boulder on a roadway. He then hid in the bushes, and watched to see if anyone would move the boulder out of the way. Some of the king’s wealthiest merchants and courtiers passed by and simply walked around it.
Many people blamed the King for not keeping the roads clear, but none of them did anything about getting the stone removed.
One day, a peasant came along carrying vegetables. Upon approaching the boulder, the peasant laid down his burden and tried to push the stone out of the way. After much pushing and straining, he finally managed.
After the peasant went back to pick up his vegetables, he noticed a purse lying in the road where the boulder had been. The purse contained many gold coins and note from the King explain that the gold was for the person who removed the boulder from the road.”
So try your best-"YOU CAN DO IT"