2. A 1000-kg car takes a 90 degree turn (1/4 of a circle) with a radius of 3.0 m in 2.4 seconds. Calculate the speed, acceleration, and net force for the car..

3. The equation that governs the circular orbit of a satellite is T = 2(pi)(^r3 / _Gme) where m_e is the mass of the earth, which is approximately 6 x 10²⁴kg. Assuming a circular orbit, to achieve an orbit at 20,000km, what would the speed need to be?

4. Which of the symbols in the equation for the period of the orbit from #3 are constants?

5. Think about Kepler's third law. It says that the square of the period of a planet's orbit is proportional to the cube of the planet's average distance from the sun. Can you explain why this is not surprising?