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unbalanced forces

forces that cause a change in the motion of an object

acceleration

(physics) a rate of change of velocity

The result is a decrease in acceleration

How does an increase in mass affect acceleration?

mass

a body of coherent matter, usually of indefinite shape and often of considerable size

Inversely means

Two values change in opposite directions

Newton's second law

Acceleration is produced when a force acts on a mass, the greater the mass, the more force is required to accelerate the object.

Equation for Newton's second law

a = F/m where a is acceleration, F is net force, and m is mass. Also written as F = ma

Force due to friction

Force created between 2 surfaces that contact each other and is in the the direction opposite to that of the motion of an object. It is mainly due to irregularities in the two surfaces…

What factors affect the force of friction?

The kinds of materials in contact and how much the surfaces are pressed together.

Because they flow

Why are both liquids and gases called fluids

air resistance

Fluid friction acting on an object moving through the air.

Free-body diagram

A diagram showing all the the forces acting on an object.

pressure

_______ is the measure of force exerted on a unit area of surface

How does the area of contact affect the pressure a force exerts on an object?

For a constant force, an increase in the area of contact will result in a decrease in the pressure.

pascals (Pa)

Unit of measure for pressure in newtons per square meter.

Why do all free falling objects fall with the same acceleration?

All freely falling objects fall with the same acceleration because the net force on an object is only its weight, and the ratio of weight to mass is the same for all objects.

What factors determine the air resistance force on an object?

The air resistance force an object experiences depends on the object's speed and frontal area.

Terminal Speed

The speed at which the acceleration of a falling object is zero because friction (air resistance) balances the weight.

Terminal Velocity

Greatest velocity an object can reach is called _______.

Deceleration

A change in speed, change in direction, or both; in a negative way, slowing down

free fall

a state in which an object is gravitationally drawn to the earth's surface and is unaffected by any forces besides weight

friction

a contact force; type of force between two touching surfaces

inertia

_______ is the property of an object that leads it to resist any change in motion

Inversely

Acceleration is _______ proportional to mass

net force

Acceleration depends on the

Newtons Second Law

A law of motion that states that acceleration is equal to force divided by mass.

Proportional

As one thing goes up, it affects another in the same way; am example is, if we double net force, acceleration also doubles

Velocity

a speed in a particular direction.

volume

The amount of space an object takes up.

weight

A force that comes from gravity pulling down on any object with mass

gravity

(physics) the force of attraction between all masses in the universe

Vector quantity

9.8m/s per second is a

no

For the balanced equation shown below, what would be the limiting reagent if 13.7 grams of NO were reacted with 30.9 grams of Cl2?

constant velocity

An object that has the same average velocity for all time intervals is moving at _______

Free fall Distance

Dv (M)= 1/2 ×G(M/S2)× T (S)2

Free fall velocity

Vv (M/S and direction)= G (10M/S2)× T (S)

Free fall average velocity

(Line over first v) Vv (M/S and direction)= Vi (M/S)+ Vf (M/S) /2

yes

Do persons A and B have the same angular velocity?

4 seconds

How long would it take an arrow shot at 40m/s upward to slow down to zero

Doubles

If we double the net force the acceleration also...

balanced forces

forces that are equal in size but opposite in direction

Push or pull

Any object that accelerates is acted on by a...

Larger acceleration

Small mass=...

Smaller acceleration

Bigger mass=...

Length width height

3 stands for cubed becasue there is a

Kilograms

Mass is measured in

unbalanced force, accelerates

acts on the puck and the puck _______

unbalanced force

force acting on an object that causes a change

Increases

As temperature increases, the vapor pressure of a liquid _______.

what is true about force and acceleration?

A net force acting on an object causes acceleration

forces acting on each cart.

A net force acts on both carts. The net force acting on the cart that accelerates faster

acceleration?

An increase in the mass will result in a decrease in the acceleration

another?

When one quantity increases, the other quantity decreases

acceleration ~ 1/mass

What shows how mass and acceleration are related?

mass, force, acceleration

What quantities are related by Newton's second law?

m/s^2, 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 _______

True

Is the following sentence true or false? Whenever we move through

200 N

A100-N force is used to accelerate a large push cart across the floor. What force is required to accelerate the push cart twice as fast.

halving the mass

An object accelerates when a net force is applied to it. What describes the conditions that would double the object's acceleration

The object accelerates at the same rate.

applied to it also doubles. Describe the object's acceleration

motion.

a + F/m

Describe what causes friction between two solid surfaces.

The friction is due to irregularities in the two surfaces being pressed together. Force is

False

(T/F) Tycho Brahe was a Danish astronomer who confirmed Copernicus's theories by making many observations with his telescope.

fluids

Where convection takes place (air, water

force, area

Quantities related to pressure

describe pressure

force per unit of area

Describe the force and pressure exerted in each case

The force exerted—your weight—is the same in both cases. The pressure exerted on

area

decreases

surface area?

pressure = force/area

a pascal.

newtons per square meter

rate.

They will fall at the same rate in a vacuum.