According to Newton's first law, which characteristic of a moving object would remain constant if there were no other forces acting on it?
O size
c
mass
O shape
O speed
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How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

What do you think car designers do if the damage caused by a crash test is too severe?