Newtons Laws

Question 1

How Many Newton’s Laws of Motion are there?

Answer 1

3

Question 2

T/F: Newton’s laws are not absolute.

Answer 2

False. Newtons Laws are absolute. There are no exceptions.

Question 3

What do Newton’s laws explain?

Answer 3

The motion of an object resulting from the forces acting on the object.

Question 4

Newton’s First Law

Answer 4

If a body is at rest, it will remain at rest. If a body is moving with constant velocity, it will continue to do so unless acted upon by a net external force.

Question 5

If an object is not ________________, it will continue to do so.

Answer 5

Accelerating

Question 6

An object that is not _____________ and an object that is _____________ at a constant velocity are fundamentally __________________.

Answer 6

Moving; Moving; the same thing.

They are both NOT accelerating

Question 7

What is a Force?

Answer 7

An interaction between two objects.

Question 8

A force must be _____________.

Answer 8

External. It cannot come from us/within.

Question 9

Forces act ____ an object.

Answer 9

ON

Question 10

Forces are _____________ quantities. They can be _______________ or _________________.

Answer 10

Vectors. Positive; Negative

Question 11

Net Force

Answer 11

The sum, or total of all forces acting upon an object

Question 12

T/F When a body is at rest, it means that there are no forces acting upon it.

Answer 12

False. It means that all the forces are adding up to zero.

Question 13

What external force allows us to walk and for a car to move?

Answer 13

Friction

Question 14

Newton’s First Law is also referred to as what?

Answer 14

Law of Inertia

Question 15

Inertia

Answer 15

The resistance of a body to change in its state of motion

Question 16

Inertia is equal to what?

Answer 16

Mass measured in kg

Question 17

The more _____________ an object is, the harder it is to change its state of motion.

Answer 17

Massive

Question 18

Mass is a _________________ quantity

Answer 18

Scalar

Question 19

Mass is totally independent of ________________.

Answer 19

Position (it is a scalar value)

Question 20

Weight is a _______________ quantity.

Answer 20

Vector. It is positional dependent.

Question 21

Conversion of Kg to Newtons

Answer 21

1 kg=9.8 N

Question 22

Weight is a measure of _____________ attraction.

Answer 22

Gravitational

Question 23

Weight (formula)

Answer 23

Fw=mg (Weight =mass * gravity)

Question 24

What are 4 types of forces?

Answer 24

Weight (measure of gravitational attraction, Fw=mg)
Normal (applied by a surface perpendicular to the surface, Fn)
Friction (resistive due to the motion between two surfaces, Ff)
Tension (within ropes, strings, cables. Applied into the line and away from the object, Ft)

Question 25

Newton’s Third Law

Answer 25

For every force that acts in nature, there must be an equal and opposite force. (for every action, there is an equal and opposite reaction)

Question 26

According to Newton’s Third Law, when you push on a wall, what is the wall doing?

Answer 26

The wall is pushing back on you with a force equal in strength.

Question 27

Why don’t action and reaction forces cancel each other out?

Answer 27

Because they act on different objects.

Question 28

Newton’s Second Law

Answer 28

If an object is acted upon by a net external force, it must accelerate in the direction of the net force.

Question 29

Net Force (equation)

Answer 29

Fnet=ma (net force=mass*acceleration)