Give It a Push! Give It a Pull!

Give It a Push! Give It a Pull!

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You push a swing. Your brother pulls a wagon. Forces are at work all around you. But what exactly is a force? And how do forces act on different objects? Read t

What Holds Us to Earth?

What Holds Us to Earth?

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A ball drops to the ground. Leaves fall from a tree. Gravity is at work all around you. But what exactly is gravity? And how does it affect different objects? R