Equilbrium Flashcards
What is the equation for torque (L)?
Torque (L) = force (f) x lever arm (r)
L = F x r
What is the torque?
The effective force causing rotation about an axis
What are the rules surrounding torques?
counterclockwise is positive
clockwise is negative
objects in equilibrium when net torque is zero
What is newton’s first law?
objects in motion or at rest tend to remain as such unless acted on by an outside force
What is inertia?
resistance to motion
What is the inertia in translational motion?
mass
What is the inertia in rotational motion?
moment of inertia (/)
What is the equation to work out the moment of inertia?
/ = Σmr²
What is momentum?
a vector quantity of the product of mass and velocity
What is the equation to work out momentum?
M = mass (m) x velocity (v)
What is the measure for change in momentum?
Impulse (/)
What is the equation for impulse?
/ = F x Δt = ΔM
What is the equation to work out collision problems when momentum and velocity are in the same direction for both vehicles?
m1v1(initial) + m2v2(initial) = m1v1(final) + m2v2(final)
