PHYSICS FORCES
Compromise of 1850 ( 5 separate laws)
-Fugitive Slave Act - federal support to slave catchers -California as a FREE STATE -Resolved boundary dispute between New Mexico & Texas -Abolished slave trade in District of Columbia -Territories of New Mexico & Utah, invoking popular sovereignty
if block is moving at constant speed up an incline, net force -
0
two people are pulling on the ends of a rope. Each person pulls with a force of 100N. The tension in the rope is
100 N
F" is always pointed towards
DOWN the incline
when finding acceleration of incline plane always do
F" - Ff = ma
what force needed to pull block up plane with constant speed
Fa - F" - Ff = 0N
if object is stationary on incline plane
Ff = F" = Fgsin0
if object is at constant velocity
Ff = mgsin0
if a force is pushing mass against a WALL remember
Fn = Fasin0 Ff = uFasin0 Fay = Facos0
kinetic friction
Friction between moving surfaces
static friction
Friction that acts on objects that are not moving
at any angle, Fn
Is less then mg, and Ff is proportional to Fn
in an Atwood machine, tension is the
SAME
If a student wants to measure inertial mass, what could they do? Choose 1 answer:
Set up a mass oscillating on an air track and measure the period of oscillations. Because this involves taking measurements of an object that are not impacted by the gravitational field, the mass measured will be the inertial mass.
which string Needs largest to be strongest not to break
The string pulling all three masses (total 6m) must have the largest tension.
the reaction force does not cancel the action force because
act on diff bodies
For three forces in equilibrium,
any one of the forces is equal and opposite to the resultant of the other two forces.
Free Soil Party
based on opposition to a "Slave Power" dominated national culture
f'' is always
down incline
If remains constant but the angle is increased, which of the following is true at some later time?
force of friction decreases
a crate of toys remains at rest on a. sleigh as the sleigh is pulled up a hill with an increasing speed. The crate is not fastened down to the sleigh. What force is responsible for the crates increase in speed up the hill.
force of static friction of sleigh on crate
object remains at rest if
fs > force applied
acceleration for a pully
higher mass - lower mass = (m1+m2)a
how to find acceleration of pulley on 90 degree angle surface
m2g - u(m1g) = (m1 + m2)a
distance is independent of
mass
static friction
maximum value of uk that will allow the boxes to stop without the top box slipping with respect to the bottom box.
F" is
mgsin0
if sliding upwards, Ff is
negative
smooth surface
no friction
for which of the following motions of an object must the acceleration always be 0
none motions guarantee 0 acceleration
if Fa<Fs
object is NOT accelerating,
Conflict over California's Statehood
ohn C. Calhoun - proposed a dual presidency -Stated Congress has no right to outlaw slavery Extending Missouri Compromise Line to the Pacific Ocean Squatter Sovereignty - settlers deciding the status of slavery Condemning slavery
acceleration down a slope is always
positive
if object is at rest on incline, Ff =
same as f", or mgsin0
what force to get it to move use
static friction
A wooden block of mass \[m\] is placed on a horizontal aluminum ramp. The angle of the ramp is slowly increased to \[13.9\degree\] above the horizontal, at which point the block begins to slide down the ramp. Determine the coefficient of static friction, \[\mu_\text{s}\], between the wooden block and the aluminum ramp.
tan(angle)
if object is moving with constant velocity, uk =
tan0
Ff is
uFn
what force to move with constant speed
use kinetic friction
