3 Flashcards
Neurons 1st law?
Objects will move at constant velocity if undisturbed.
Inertial coordinate system?
Newton’s 2nd law?
F^-> = m a->
Two ways to write F-> ? (2•)
F-> = m a->, F-> = dp-> / dt
p-> = ?
m v-> = momentum
Neutron’s 3rd law?
Forces always come in equal or opposite pairs.
Equation of newton’s 3rd law?
F->_1,2 = - F->_2,1
Normal force?
A force that is perpendicular to the surface.
????Review vector addition and substraction
Single criteria of a non-inertial frame?
The acceleration is non-zero and the velocity is not constant.
Normalization?
Gravitational constant (G)?
6.67 * 10^-11 N kg^-2 m^2
Newton’s equation of gravity?
->F_d = ^r_d (-(G m1 m2) / r_d^2)
C is the contact force. C-> = ? (2•)
•N-> + f->^_k or •N-> + f->^_s
f->^_k is the kinetic friction. |f->^_k| = ?
mu_k |N->|, N-> is the normal force.
What is the criteria of kinetic friction? (2•)
•Independent of the contact area
•Independent of the speed.
Static friction (f->^_s)?
The friction that stops the object from moving (v-> = 0)
|f->^_s max| = ? (2•) list condition of M_s
M_s |N->| where M_s > M_k
Friction force is to the normal force?
Proportional
If Mu > 1, then?
Then the friction is greater than the weight of the object. (Easier to lift than to drag)
Prandtil-Tomlinson’s Model?
A microscopic model of friction where one atom in a spring goes along potential energy.
Tension: T(X) = ?
|F_RL (X)|, where R and L are either sides of a rope.
How is tension between both sides of a rope related when acceleration is 0?
The tension between both sides are equal.
Normal Force N->?
The force that is perpendicular to the surface. ONLY applicable if the object is touching the surface.
Newtons (N)?
kg(m/s^2)
