Why is straight line motion hard to experience on Earth?
A. Earth's gravity increases.
B. Friction and gravity change the motion.
C. Earth's magnetism gets in the way.
D. Inertia gets in the way.

The gravitational force between pluto and charon is 3.61 × 1018 n. pluto has a mass of 1.3 × 1022 kg, which is only slightly greater than charon’s mass of 1.6 × 1021 kg. how far apart are pluto and charon? 2.0 × 107 m 2.4 × 1012 m 3.8 × 1014 m 5.8 × 1024 m