Paper One: Mechanics Flashcards
(22 cards)
What are the four S.U.V.A.T equations?
S = u t + 1/2 a t^2 V = u + at S = ( (u+v) t) / 2 and... V^2 = U^2 + 2 as
What is the gradient of a Displacement vs Time graph?
The velocity of the object.
What is the gradient of a Velocity vs Time graph?
The acceleration of the object.
What is the area under the line of a Velocity vs Time graph?
The displacement of the object.
What is the area under the line of a Acceleration vs Time graph?
The change in velocity of the object.
What is a scalar quantity?
A magnitude with no specific direction e.g Mass.
What is a vector quantity?
A magnitude that acts in a specific direction e.g Acceleration.
If a vehicle travels 2 Kilometres north and 5 Kilometres east what is its resultant displacement?
SQRT ( 2^2 + 5^2) = 5.39 K.M = 5390 Metres.
What is Newton’s second law of motion?
F = MA
What is Newton’s first law of motion?
An object will remain at rest unless acted upon by an external force.
What is Newton’s third law of motion?
Every action must have an equal and opposite reaction?
What is the equation for weight?
Weight = Mass x Gravity.
What is the equation for gravitational field strength?
Gravitational Field Strength = Force / Mass.
What is the equation for the momentum of an object?
Momentum = Mass x Velocity ( P = MV )
What is the principle of conservation of linear momentum?
All linear momentum is conserved IN A CLOSED SYSTEM.
What is the equation for the moment of a force?
moment of force = Fx where x is the perpendicular distance between the line of action of the force and the axis of rotation.
Where must distance in the moment equation be taken from?
From the CENTRE of the body or rotation.
What is the equation for work done?
Work Done = Force x Distance.
What is the equation for Kinetic Energy?
Ke = 1/2 Mass Velocity^2.
What is the equation for Gravitational Potential Energy?
Egrav = Mass x Gravity x Height.
What is the principle of conservation of energy?
Energy cannot be created nor destroyed, only transferred.
What is the equation for efficiency?
Efficiency = Total (Power/Energy) Out / Total (Power/Energy) In.
