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Forces

Forces. Gravity Friction Up thrust Air resistance. Gravity. Gravity is the force that pulls us towards the earth. . It gives everything a weight. if gravity didn’t exist we would float around like astronauts in space. FRICTION. What do you notice about the soles of your shoes?

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Forces

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  1. Forces Gravity Friction Up thrust Air resistance

  2. Gravity • Gravity is the force that pulls us towards the earth. • It gives everything a weight • if gravity didn’t exist we would float around like astronauts in space

  3. FRICTION • What do you notice about the soles of your shoes? • There are patterns of ridges which are designed to stop you from slipping. • A force called friction is created when 2 or more surfaces rub together. • The greater the friction the more the 2 surfaces grip. Why does a tyre need friction?

  4. Upthrust • Have you ever wondered why most boats don’t sink? • A force called Upthrust is present in water. It counteracts the effect of gravity. • Look at the upthrust on this ship. Where would gravity be? upthrust

  5. Air resistance • Why isn’t this glider falling straight to the ground? • Air resistance is the force that allows things to fall slowly. • What other sports or modes of transport rely on the force of air resistance? • Could you draw arrows to show the ‘air’ force? gravity Air resistance

  6. Force yourself! • What forces are in action in this picture? • What could you use to show the type, strength and direction of forces?

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