Physics: Mechanics Flashcards
Acceleration
The rate of change in velocity.
Impulse
The rate of change of momentum with respect to time.
Law of the conservation of momentum
The total linear momentum of an isolated circuit is constant.
Elastic collision
Total kinetic energy is conserved and no energy is lost in deforming objects
Inelastic collision
Kinetic energy is NOT conserved.
Energy is used up in deforming objects
(perfectly inelastic = all kinetic energy lost)
Gravitational potential energy
The potential energy an object possesses due to its height above the earth
Ep = m.g.h
Kinetic energy
The energy an object has due to its motion
Energy associated with the motion of an object, depending on both the mass and speed of the object.
Mechanical energy
The sum of the kinetic and potential energy in a system
Gradient of displacement vs time graph
Velocity
Gradient of velocity vs time graph
Acceleration
Area under a velocity vs time graph
Displacement
Newton’s First Law
An object will remain at rest or continue moving at a constant velocity unless acted upon by a non-zero resultant force
Newton’s Second Law
If an object is acted upon by a non-zero net force, it will experience an acceleration that will be directly proportional to the net force and inversely proportional to the mass of the object.
The direction of the acceleration will be in the direction of the net force.
Newton’s Third Law
If body A exerts a force on body B, body B will exert a force on body A.
The forces will be equal in magnitude but opposite in direction.
Projectile
A body that is projected through a gravitational field
