P2- Forces Flashcards
(34 cards)
Scalar
Measurable quantity that has only magnitude
Equilibrium
Situation in which there is no resultant force acting on an object
Elastic deformation
When a spring is stretched and can return to its original length when the force is removed
Pivot
The point around which a seesaw or lever turns
Displacement
Distance moved in a particular direction
Crumple Zone
An area of the car that is designed to deform and crumple in a collision
Balanced force
When 2 or more forces act on a body giving zero resultant force
Stopping Distance
Total distance a vehicle travels before coming to a complete stop
Momentum
The product of mass and velocity for an object
Plastic Deformation
When a spring is stretched and cannot return to its original length when the force is removed
Acceleration
The rate at which an object speeds up
Limit of Proportionality
Point beyond which the extension of an elastic object is no longer proportional to the force applied
Resultant Force
Single force that would have the same effect as all the forces that are acting on the object
Velocity
Speed at which an object is moving in a particular direction
Inertia
The natural tendency of an object to resist a change in its velocity
Reaction Time
Time it takes a vehicle driver to respond to a danger on the road
Moment
The turning effect of a force
Hydraulic System
A machine that transmits pressure through a liquid
Free-Body diagram
Drawing showing the direction and magnitude of the forces acting on an object shown as a point
Vector
Measurable quantity that has both a magnitude and a direction
Distance Travelled (Calculation)
Speed x Time
Acceleration (Calculation)
Change in Velocity ÷ Time
Kinetic Energy (Calculation)
0.5 × mass × speed^2
Momentum (Calculation)
Mass × Velocity
