Newton's Laws of Motion

Newtons first law's 2nd part is what?

An object moving at a constant speed will stay at a constant speed,

What is fluid friction?

An object that moves through fluids or air

What is rolling friction?

An objects that rolls over a surface.

An unbalanced force can _______and________ an object.

An unbalanced force can move and stop an object.

How do find the weight of a falling object?

F=M x A

Newton's second law in formula format is _____________.

F=M x A

What does a spring scale measure?

Force

Force is measured in __________.

Force is measured in Newtons.

_____ always act in pairs.

Forces always act in pairs.

What force will always go against an object?

Friction

How does friction affect the motion of objects?

Friction slows and/or stops objects

Eventually the air resistance equals the force of what?

Gravity

If an object has more mass, it has more __________.

If an object has more mass, it has more inertia.

If the mass of two objects is the same and more force is exerted on one object, the object will accelerate ________.

If the mass of two objects is the same and more force is exerted on one object, the that object will accelerate faster.

If you use the same amount of force on two objects, the object with less mass will accelerate _________ than the object with greater mass.

If you use the same amount of force on two objects, the object with less mass will accelerate faster than the object with greater mass.

If you want to accelerate two objects at the same rate, then it takes ______ force to accelerate the object with the greater mass.

If you want to accelerate two objects at the same rate, then it takes MORE force to accelerate the object with the greater mass.

Mass is determined by how much ________ is in an object?

Mass is determined by how much matter is in an object.

How does pushing off of a boat represent the 3rd law?

You exert a force on the boat and the boat pushes back on you... end result: you jump into the water.

What two factors affect the gravitational force between two objects?

mass and distance

Name the three types of friction.

1. Sliding Friction 2. Rolling Friction 3. Fluid Friction

What 2 things does the force of friction depend on?

1. types of surfaces 2. how hard the surfaces push together

What causes friction?

2 surfaces rubbing together.

What is sliding friction?

2 surfaces sliding over each other

A hammer hitting a nail is an example of which law?

3rd Law, The hammer puts a force on the nail and the nail puts a force back on the hammer... end result: nail goes into wood.

Air resistance increases with _______ and ______ ______.

Air resistance increases with VELOCITY and SURFACE AREA.

If objects are supposed to fall at the same rate, why don't we observe this to be true?

Air resistance which is a fluid friction gets in the way of the falling object. The greater the surface area the greater the air resistance.

All objects with mass have ________.

All objects with mass have inertia.

An apple falling from a tree is an example of what force?

An apple falling from a tree is an example of gravity.

Newtons first law's first part is what?

An object at rest will stay at rest,

Newton's third law of motion states that for every _____ there is an equal and opposite _________.

Newton's third law of motion states that for every action there is an equal and opposite reaction.

Objects with inertia have the tendency to __________ ___ _______ ___ __________.

Objects with inertia have the tendency to resist a change in motion.

What is Newton's 2nd Law?

The force needed to move an object depends on the mass of the object and how much you want it to accelerate.

The universal law of gravitation states:

The force of gravity acts between all objects in the universe.

If a truck slams the breaks on an icy road, why will the truck take longer to stop than on dry roads?

The icy road provides less traction and less friction so inertia carries the truck forward until friction overcomes the inertia.

The object may continue to fall, but when velocity no longer increases, we say the object has reached _______ __________.

The object may continue to fall, but when velocity no longer increases, we say the object has reached Terminal Velocity.

The scientist's word for lazy is _______.

The scientist's word for lazy is inertia.

Newtons first law's 3rd part is what?

Unless acted upon by an unbalanced force.

______ is the rate of motion in a certain direction.

Velocity is the rate of motion in a certain direction.

Since Force= mass x acceleration, what is the formula used to calculate weight?

W= M x A

______ is a measure of the force of attraction on the mass of an object.

Weight is a measure of the force of attraction on the mass of an object.