[Custom] Forces Flashcards
Define 1 Newton
State the equation
The force that will give a mass of 1kg an acceleration of 1ms^” in the direction of the force.
F = ma
Define weight
State the equation
The gravitational force acting upon an object, through its centre of mass
W=mg
Define friction
The force that arises when two surfaces rub against eachother
Define drag
The resistive force on an object travelling through a fluid (water or air)
Tension
The force within a stretched cable or rope
Upthrust
The upward buoyancy force acting on an object when it is in a fluid.
Normal contact force
The force arising when an object rests against another object acting at a 90 degree angle to the plane of contact.
Define moment
Force x Perp Distance from the line of action of the force to the axis or the point of rotation.
State the principal of moments
For a body in rotational equilibrium, the sum of the anticlockwise moments is equal to the sum of the anticlockwise moments
What is the torque of a couple defined as?
The magnitude of one of the forces multiplied by the perpendicular separation between the forces.
At any depth, the pressure in a fluid will be exactly the same in every _____
direction
Define power
The rate of doing work
What is centre of mass?
The point where the entire weight of the object appears to act.
