PhyFinalReviewer

What are the 3 types of collisions?

Elastic Collision Inelastic Collision and Perfect Inelastic Collision

In the absence of external forces the momentum of a system remains constant

Conservation of momentum

momentum BEFORE = momentum AFTER

Conservation of momentum

What happens in Elastic

They bounce off each other

What happens in Inelastic

They stick together

An _____ collision is one in which the total KE as well as the total momentum of the system is conserved

Elastic Collision

Any collisions in which the total kinetic energy is not conserved is called an _______

Inelastic collisions

A collision in which a body stick together on colliding and proceed thereafter with a common velocity is side to be perfect inelastic

Perfect Inelastic Collision

One object separates into two fragments

Explosions

Two objects collide and stick together

Inelastic Collisions

Two objects collide and bounce off each other

Elastic Collisions

When is this use "M1V1 + M2V2 = M1V1' + M2V2'"

Elastic and Inelastic Collisions

M1V1 + M2V2 = M1V1' + M2V2

momentum BEFORE = momentum AFTER

The concept of change in momentum is?

impulse

Change in momentum of an object that is caused by a force acting on a object for some period of time

impulse

What is the representation of impulse?

letter J

since momentum is a vector .. is impulse a vector too?

true

Impulse can be described mathematically in many ways

true

Can a momentum of an object change significantly by a small force if the force acts over the a long period of time?

true

Can a momentum of an object change significantly by a large force if the force acts over the a short period of time?

true

Impulse is not the rate of change in momentum but the total chage in momentum. true or false?

true

Can a quick change in momentum and a slow change in momentum can involve the same impulse?

True

Suppose you jump from a high perch does flexing your legs increase the stopping time and reduse the stopping force?

True

momentum is a vector .. impulse is not True or false?

false

Impulse cannot be described mathematically in many ways

false

Can a momentum of an object change significantly by a small force if the force acts over the a short period of time?

false

Can a momentum of an object change significantly by a large force if the force acts over the a long period of time?

false

Suppose you jump from a high perch does flexing your legs decrease the stopping time and reduse the stopping force?

false

EF=ma

the perverted version

The net force acting on a body is equal to the product of the body's mass and its acceleration

the perverted version

Newton's "quantity of motion" is what we now call?

Momentum

it is the product of an object's mass and velocity

Momentum

What is the SI unit of momentum?

kilogram-meter per second (kg*m/s)

it is equivalent to the newton-second law(N*s)

kilogram-meter per second (kg*m/s)

EF=^p/^t

original version

The net force acting on a body is equalto the rate at which the body's quantity of motion is changing

original version

Is the original version of the law different from the perverted one?why?

no new rules we simply have a new way of stating newton's second law