# Forces

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• Forces
• Between Objects
• Objects give equal and opposite forces on each other
• Action and Reaction forces
• Measured in NEWTONS
• Resultant Force
• Single force that would have the same affect on the object as all the forces acting together
• Force at zero
• If the object is still, it will stay still
• If the object is moving it will carry on moving at the same speed and same direction
• Not at zero
• Results in acceleration in the direction on the force
• If the object is at rest it will accelerate in the direction of the force
• If already moving in the direction of the force the object will accelerate in that direction
• If the object is moving in the opposite direction of the fore it will decelerate
• If the object is moving it will carry on moving at the same speed and same direction
• Acceleration
• F=m x a
• The greater the Resultant Force on an object the greater acceleration
• Resultant Force
• Single force that would have the same affect on the object as all the forces acting together
• Force at zero
• If the object is still, it will stay still
• Not at zero
• Results in acceleration in the direction on the force
• If the object is at rest it will accelerate in the direction of the force
• If already moving in the direction of the force the object will accelerate in that direction
• If the object is moving in the opposite direction of the fore it will decelerate
• Acceleration
• F=m x a
• The greater the Resultant Force on an object the greater acceleration
• The bigger the mass of the object the more force needed to make the object accelerate
• The bigger the mass of the object the more force needed to make the object accelerate
• On the road
• Stopping distance= thinking distance+ braking distance
• Thinking distance increased if driver is tired or under drugs/alcohol
• Braking distance increased by road/weather conditions and car condition