# Physical Science Ch. 5 Sec. B

### 15 terms by crougeau

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

Hamilton Christian Academy - Mrs. Rougeau

### inertia

What property of matter makes it want to continue to move indefinitely unless acted upon by an outside force?

### Newton, Galileo

Who proposed the laws of motion and whose work did he base his studies on?

### Objects at rest tend to remain at rest and objects in motion tend to remain in motion unless acted upon by a force

Newton's first law of motion is known as the law of inertia, what does this law state?

### Mechanical equilibrium

When the net force on a system is zero there is no motion and the system is said to be in a state of what?

### The acceleration of a system is directly proportional to the force and inversely proportional to the mass, F = ma

Newton's second law is the law of accelerated motion, what does this law state and what is the formula that goes along with the law?

### F = net force, m = mass, a = acceleration

In the formula for accelerated motion, what do the variables mean and what are the units for each variable?

### For every action there is an equal but opposite reaction

Newton's third law is the law of action-reaction, what does this law state?

### Friction

What is a contact force that opposes the movement of objects past each other?

### Perpendicular to the surface

In what direction is the "normal" force on a system?

### Static (between stationary objects), kinetic (sliding objects), rolling (rolling object and stationary surface), fluid (moving object immersed in a fluid)

List and explain the four types of friction.

### Contact

Friction always occurs between systems in what?

### Materials

Friction depends on the kind of what in contact?

### Opposite direction

The friction vector acts in what direction with respect to the system's motion?

### Normal force

The magnitude (amount) of friction is proportional (increases / decreases as the other increases / decreases) to the what acting on the system?

### Moving past each other

There is greater friction between two stationary (still) objects than when they are what?

Example: