Honors Physics: Gravitation #2 Name:_______________________ Objectives: P3.1b, 3.1A, P3.6A,B,C,d Directions: Please show knowns, formula and solutions for full credit. 1. The gravitational force between two electrons 1m apart is 5.42 E -71n. Find the mass of an electron. Knowns formula Solution ______________ 2. What would be the earth?s gravitational attraction(g) on a 75kg astronaut who is one earth radius above the earth?s surface? Knowns formula Solution ______________ 3. If the mass of Mars is 6.6E23kg and its gravity is 3.7m/s/s, what is the radius of Mars? Knowns formula Solution ______________ 4. A 25 kg object is 201 km above the earth?s surface. Find Knowns formula Solution