Three-year-old ben and his father are playing with a ball at the park. ben’s father throws a ball high up into the air. ben thinks the ball will never come back. his father assures him that the ball will always come back. what made ben’s father so sure that the ball would fall back to earth

as technology advances, new experiments often expose problems in accepted theories. c

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speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

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explanation: