physics test ch. 6-7 (part 1)
inversely proportionality
1 quantity increases, other decreases
200N
a 100N force is used to accelerate a large push cart across the floor...how much force is required to accelerate push cart twice as fast
free-body diagram
a diagram in which all of the forces acting on an object are shown
newton's second law
acceleration is directly proportional to net force; direction of acceleration is same as net force; acceleration is inversely proportional to mass
increases
acceleration of an object is directly proportional to the net force acting on it...this means that as the net force acting on the object increases, the acceleration of the object _____
terminal speed
acceleration of falling object is zero
halving the mass
an object accelerates when a net force is applied to it...what would double the object's acceleration
decreases
as the area of a force acts on increases the force exerted on each unit of area _____
net
combination of forces acting on an object is known as the _____ force
pressure = force/area
equation for pressure when the force is perpendicular to the surface area
pressure
force per unit of area
friction between 2 solid surfaces
friction is due to irregularities in the 2 forces being pressed together; force needed to move 1 material up and over the other
acceleration ~ 1/mass
how mass and acceleration are related
mass; acceleration
increase in _____ decreases _____
pascal
measurement of pressure
acceleration
net force acting on an object causes _____
a = F/m
newton's second law of motion
free fall
object dropped in air that experiences no air resistance
mass
quantity related by newton's second law
force and area
quantity related to pressure
terminal velocity
terminal speed + direction
unbalanced
the type of force that causes acceleration
true
true or false: acceleration of object is equal to net force acting on it divided by object's mass
true
true or false: friction depends on how much the materials in contact are pushed together
false
true or false: friction does not depend on the types of material in contact with each other
true
true or false: when friction is present and object can move with constant velocity even when an outside force is applied
newtons per square meter
unit for pascals
unbalanced force; accelerates
when a hockey puck is struck with a hockey stick an _____ acts on the puck and the puck _____
m/s² ; kg
when using the equation for newton's second law, if force is measured in newtons, then the unit for acceleration is _____ and the unit for mass is _____
