MODULE 5 IQ2 Flashcards
What is the magnitude and direction of velocity in uniform circular motion
magnitude is constant and direction is tangential
centripetal force equation
F(c) = mv^2/r
where:
F(c): centripetal force (N)
m: mass (kg)
r: radius (m)
v: velocity (ms^-1)
which direction is centripetal acceleration pointed to?
pointed towards the centre
centripetal acceleration equation
a(c) = v^2/r
where:
a(c): centripetal acceleration (ms^2)
v: velocity (ms^-1)
r: radius (m)
what is centrifugal force?
it is a ‘fictional force’ –> consequence of inertia & an accelerating frame of reference
what is non-uniform circular motion?
v = 2 π.r/T
v = rw
angular velocity equation
w = ∆θ/∆t
where:
w: angular velocity (ms^-1)
∆θ: change in angular rotation
∆t: change in time (s)
advantages of a banked track
allows faster velocities as gravity contributes to the centripetal force
banked tracks formula
F(c) = F(N)sinθ
where:
F(c): centripetal force (N)
θ: angle of banked track
what is torque?
rotational equivalent of linear force and is a vector. occurs when a force (F) is applied at some displacement (r) from an axis of rotation
what is the direction of torque?
perpendicular to the plane of rotation and direction is determined using the right hand
torque equation
τ = rFsinθ
where:
τ: torque (Nm)
r: distance from applied torque (m)
F: force (N)
θ: angle
uses of torque
required to tighten a bolt. spanner with a longer handle will allow for a smaller force.
