# LSMS Newtons Laws, Gravity, Momentum

## 17 terms

### Gravity

a force that pulls objects toward each other

### Terminal velocity

the greatest velocity a falling object reaches - when the force of air resistance equals the weight of the object

### Air resistance

a force that opposes the motion of objects through the air

### Projectile motion

the curved path that an object takes when thrown due to the horizontal and vertical movement of the object

### Free fall

the motion of an object when the only force acting on it is gravity - only occurs in outer space and in a vacuum

### Law of Universal Gravitation

all objects in the universe attract each other through gravitational force

### Newton's 1st Law

objects at rest stay at rest and objects in motion stay in motion unless acted on by an unbalanced force

### Newton's 2nd Law

acceleration depends on the object's mass and on the net force acting on it

### Newton's 3rd Law

for every action, there is an equal and opposite reaction

### Inertia

tendency of an object to resist a change in motion

### Momentum

depends on the mass and velocity of a moving object

### Mass

the amount of matter in an object

### Weight

the measure of gravitational force on an object

### Acceleration

the rate at which velocity changes over time

a push or pull

### Conservation of Momentum

when two objects collide, they exchange or transfer momentum - but the total amount of momentum stays the same

### Centripital force

a force that causes an object to move in a circle