Solve these Problems:

13. 14. The only force an electron is one of -8.93)(10'30 N L In the inside front cover of your textbook you will find that the mass of the electron is 9.11X1t):31 kg. The mass we take to be constant. The electron's initial position is the origin and its initial velocity is 3.00X107 m/szi, + 4 X10? m/s j . What is the position of the electron after 5.00X10'9 g Mars is near Opposition now hence on the same side of the Sun as the Earth and 8.2)(107 km from the Earth, whereas next November, when it is at Conjunction, it will be 3.8)(108 km away. The force of gravity is inverse square, so the Earth exerts a gravitational force now on Mars that is (8X1El7/4)