Q1. The astronaut orbiting the Earth is preparing to dock with a Westar VI satellite. The satellite is in a circular orbit 600 km above the Earth's surface, where the free-fall acceleration is 8.21m/s2. Take the radius of the Earth as 6400 km. find out the speed of the satellite and the time interval required completing one orbit around the Earth.

Q2. A stone is dropped into a river from a bridge 43.90 m above the water. Another stone is thrown vertically down 1.00 after the first is dropped. The stones strike the water at the same time. (a) What is the initial speed of second stone? (b) Plan velocity versus time on a graph for each stone, taking zero time as the instant the first stone is released.