A meteoroid is moving towards a planet. It has mass m = 0.82×109 kg and speed v1 = 5.6×107 m/s at distance R1 = 1.1×107 m from the center of the planet. The radius of the planet is R = 0.78×107 m. The mass of the planet is M = 5.2×1025 kg. There is no air around the planet. show answer Correct Answer 14% Part (a) Enter an expression for the gravitational potential energy PE1 of the meteoroid at R1 in terms of defined quantities and the gravitational constant G. Assume the potential energy is zero at infinity. PE1 = ( - G M m )/R1 ✔ Correct!show answer Correct Answer 14% Part (b) Calculate the value of PE1, in joules. PE1 = - 2.587 * 10( 17 )PE1 = -2.587E+17 ✔ Correct!show answer No Attempt 14% Part (c) Enter an expression for the total energy E1 of the meteoroid at R1 in terms of defined quantities.