What is the force that every mass exerts on every other mass called?gravitymatterpullweight.

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.

Work = force × a. work b. energy c. distance d. momentum

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