Mechanics Flashcards
Displacement
Distance in a direction
Speed
Rate of change of distance with respect to time
Velocity
Rate of change of displacement with respect to time
Acceleration
Rate of change of velocity with respect to time
Scalar Quantity
Magnitude only
Vector Quantity
Magnitude and direction
A Force
Causes Acceleration
The Newton
force which gives 1kg an acceleration of 1m/s
Friction
Is a force which opposes the relative motion between objects
Mass
Is a measure of how difficult it is to accelerate that body
Weight
The force of Earth’s gravity acting on an object
Momentum
Is the product of mass times velocity
Newton’s first law of motion
Every object will remain at rest or at a constant velocity unless and external force is applied
Newton’s second law of motion
the rate of change of and objects momentum is directly proportional to the force applied and is in the same direction
Newton’s third law of motion
Every action has and equal but opposite reaction