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Forces and Motion

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Force

• force is measture in newtons
• F=ma
  • force = mass x acceleration
• Unbalanced forces=motion
  • speed
    • s=d/t
  • acceleration
    • (v-u)/t
  • veloctiy
    • v=at
• or if objects are moving, it stays at constant speed

Acceleration

larger force - greater the acceleration for the same mass

larger mass - smaller the acceleration for the same mass

Friction

• occurs whenever two surfaces are gripping - static friction
• occurs whenever two surfaces are sliding over each other
• air resistance

Firction Changes

• Speed increases - friction increases

There is always an equal and opposite force to a force

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by: Admin
Total views: 5251
Word Count: 321
Date: Mon, 22 May 2006 Time: 12:00 AM
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