physics unit2

A glass is sitting on the edge of the table and it falls. According to Newton's First Law, what happened to it?

A force acted on it

What is Newton's third law of motion?

For every action force, there is and equal and oppositely directed reaction force.

Newton's third law of motion is also called the _____

Law of Force Pairs

What does Newton's First Law of Motion state?

Objects at rest remain at rest, and objects in motion continue in motion at the same velocity, unless acted upon by an outside force.

What does Newton's Second Law of Motion state?

The acceleration of an object acted upon by a constant force is directly proportional to the force and inversely proportional to the object's mass. In addition, the acceleration occurs in the same direction as the applied force.

What does the first part of Newton's Second Law mean?

The acceleration of an object is directly proportional to the force acting on it.

What does the second part of this law mean?

The acceleration of an object is inversely proportional to its mass.

What does the third part of this law mean?

The object's motion has to be in the same direction as the acceleration or vector force.

What were the 3 areas of scientific study undertaken by Newton during his exile period?

calculus ✓ light and the visible spectrum ✓ gravitation

In the formula F=ma, an object's mass is _____ related to the force on the object.

directly

The planet Saturn revolves around the Sun in a curve that has two foci, or a(n) _____ orbit.

elliptical

When an airplane is moving at a constant speed, a constant _____ is needed to keep it moving.

force

You attempt to move a medium-weight box across a gravel driveway. Because of _____, the surfaces between the box and the driveway make the task difficult.

friction

An arrow shot into the air will follow a curved path instead of a straight line because _____ act upon it.

gravity and friction

Two forces that oppose the inertia of a moving object are ___

gravity and friction

The property of motion Isaac Newton describes in his First Law of Motion was _

inertia

You are riding your bicycle at about 20 mph when you stop pedaling. The bicycle keeps pf moving due to ____

inertia

In the formula f=ma an object's mass is _____ related to the acceleration on the object.

inversely

A glass is sitting on the edge of the table. According to this Newton's First Law, what will happen

it will remain there

___ force is a supportive force that surfaces exert in order to keep solid objects from passing through one another.

normal

The other name for Newton's third law of motion was given because the law involves __

opposing forces

In 1664, Isaac Newton left London due to the __

plague

A hockey puck will travel across the ice in a(n) _____, unless acted upon by an outside force.

straight line

What is meant by net force?

the sum of all forces working on an object

It has been speculated that _____ is the reason for inertia.

universal gravity