20 questions. Physical science

Includes index

What is force? -- Can we see force? -- Does every object take the same amount of force to move? -- Can several forces act on an object at the same time? -- Does force always cause movement? -- When I push something, does it always push me back? -- Is that what happens when I let go of a balloon full of air? -- What happens if I use force on a moving object? -- Will an object move if no force acts on it? -- Does this mean that a ball will keep rolling forever? -- What kind of forces stop motion? -- Why does a ball continue moving longer than a block? -- What force makes two magnets move toward each other? -- Why do magnets sometimes push away from each other? -- Can you see magnetism in nature? -- What force causes an apple to fall to the ground? -- Why can't I kick a ball into outer space? -- How does gravity work?

Provides answers to questions related to the energy and force, including information on mass, friction, magnetism, and gravity