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FORCE , ENERGY & MOTION SOL 4.2

FORCE , ENERGY & MOTION SOL 4.2. SPEED describes how fast an object is moving. Speed can. remain the same. increase. DECREASE. ENERGY may exist in two states: potential or kinetic. Potential energy is stored energy. Kinetic energy is the energy of motion.

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FORCE , ENERGY & MOTION SOL 4.2

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  1. FORCE, ENERGY & MOTIONSOL 4.2

  2. SPEED describes how fast an object is moving. Speed can... remain the same increase DECREASE

  3. ENERGY may exist in two states: potential or kinetic. Potential energy is stored energy. Kinetic energy is the energy of motion.

  4. Potential energy is stored energy. What are some other examples of potential energy? *A baseball pitcher right before he throws the ball. *A roller coaster at the top of a tall hill.

  5. Kinetic energy is energy of motion. What are some other examples of kinetic energy? *A baseball pitcher as he throws the ball. *A roller coaster going down the hill.

  6. Kinetic energy is energy of motion. *ALL moving objects have kinetic energy. *When an object is in motion, it changes position by moving in a direction: down up forward backward

  7. A forceis any push or pull that causes an object to: • Forces transfer energy. • When you throw a ball, the force of your arm pushes the ball into the air. • Energy is transferred from your arm to the ball. *move *change direction *change speed *stop

  8. Without force, an object at rest will stay at rest! The pull of gravity is a force that might set an object (or a skier) in motion. The pull or push of a magnet is another force that can move objects. The force you exert with your legs or arms can set a ball in motion.

  9. Unless acted on by a force, an object in motion will stay in motion! An object will continue to move until a force slows or stops it. • The force stopping the object's motion might be an obvious one - the ground!

  10. The greater the force, the greater the change in motion.

  11. The more massive an object, the less effect a force will have on an object. For example, it's easier to push a light plastic ball than a more massive boulder. It's also harder to stop a boulder when it is rolling down a slope.

  12. FRICTION is the resistance to motion created by two objects moving against each other. . the sled and the snow, for instance FRICTION creates HEAT! Rub your hands together!

  13. The skier is standing at the top of the mountain. Is the picture meant to show potential or kinetic energy?

  14. Which object on the shelf has the greatest potential energy?

  15. These passenger are just starting their descent. What's happening? potential energy is changing to kinetic energy

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