The laws of motion, which describe the effects of forces, apply to everything in the universe, from planets to tiny particles. Forces exist when things are pushed or pulled. Gravity is one very important force, but so are magnetism and electricity. The science of forces and motion explains such things as how airplanes fly, how rockets go into space (and why people don’t), how engines move cars and trucks, and how brakes stop them. For more information, read Isaac Newton: Groundbreaking Physicist and Mathematician, another book in the Mission: Science series.
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