JOURNEY TO THE END OF THE EARTH

STATEMENT-1 : If a hole were drilled through the centre of the earth and a ball dropped into the hole at one end, it will not pop out of other end of the hole. STATEMENT-2 : It should come out of the othe end normally.

Find the centre of gravity of a uniform vertical rod height = R/3, where R is the radius of Earth. The lower end of the rod is touching the surface of the Earth.

At the start of a journey, the meter of a car reads 678.3 km. At the end of the journey, the meter reads 913.5 km. What was the distance covered by the car during the journey?

A man started his journey on his car from location A and came back. The given graph shows his position at different times during the whole journey. (a) At what time did he start and end his journey? (b) What was the total duration of journey? (c) Which journey, forward or return, was of longer duration? (d) For how many hours did he not move? (e) At what time did he have the fastest speed?