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Unit 2: Kinematics
Physics 11
Question | Answer |
---|---|
Displacement | the distance between the initial and final position |
Speed | the rate of change of distance with time |
Velocity | the rate of change of displacement with time |
Acceleration | the rate of change of velocity with time |
Instantaneous Velocity | velocity of an object at a particular moment in time |
Newton's 1st Law | an object continues in uniform motion in a straight line unless a force acts |
Newton's 2nd Law | force= mass x acceleration (the rate of change of momentum) |
Newton's 3rd Law | for every action there is an equal and opposite reaction |
Translational Equilibrium | no resultant force in any direction |
Impulse | change of momentum |
The law of conservation of linear momentum | in an isolated system, momentum remains constant |
Work | force x distance moved in the direction of the force |
The principle of the conservation of energy | energy cannot be made of destroyed, only changed from one form to another |
Inelastic Collision | when there is a change in kinetic energy |
Elastic Collision | when there is no changed of kinetic energy |
Power | is the rate at which energy is transferred |
Efficiency | the ratio of useful energy to the energy transferred |