E_QUEST1 How are the ocean tides on earth affected by gravity and the way the planet spins?
E_QUEST2 If you drop a basketball and a baseball at the same instant from the same height, which object will strike the ground first? Why?
E_QUEST3 How much force is Earth's gravity exerting on each of your family members? Use a bathroom scale to find out.
D_TEXTBLOCK_TEXT Every object in the universe attracts or pulls on every other object; this <HL Topic=Force.tpc>FORCE</HL> is called gravity. When an object's <HL Topic=Mass.tpc>MASS</HL> is large, its gravitational <HL Topic=Force.tpc>FORCE</HL> is stronger than smaller <HL Topic=Mass.tpc>MASSES</HL>. When two <HL Topic=Mass.tpc>MASSES</HL> are close together, the gravitational <HL Topic=Force.tpc>FORCE</HL> between them is stronger than when they are far apart.