Forces-Paper 2
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What is a contact force
Require objects to be touching
What is a non-contact force
Forces that act over a distance
What is a scalar quantity
Scalar quantities have magnitude
What are 4 examples of a scalar quantity
Speed Distance Time Energy
What are 4 examples of a vector quantity
Velocity Displacement Force Acceleration
What is the difference between distance and displacement
Distance is scalar Displacement is vector
What is the resultant force
Single overall force acting on an object
How can speed be calculated from a distance-time graph
The Gradient
How is acceleration calculated from a velocity-time graph
The gradient
What is Hooke’s Law
The extension of an elastic object is directly proportional to the force applied Provided the limit of proportionality is not exceeded
What is Newton’s first law
An object will remain at rest or continue moving at the same velocity unless acted on by a resultant force
What is Newton’s Second Law
The acceleration of an object is directly proportional to the resultant force acting on the object
What is thinking distance
The distance the vehicle travels during the time the driver sees the hazard and applies the brake
What is braking distance
The distance the vehicle travels after the brakes are applied until it comes to a complete stop as a result of the braking force
What can cause forces to produce rotations
Levers or Gears
What is the moment of a force
The turning affect of a force
What is inertial mass
A measure of a body resistance to acceleration caused by forces
What is the Principle of Conservation of Momentum
The total momentum of all objects before an interaction is the same as the momentum of the object after the interaction