Physics 2 & 3

Vector

A physical quantity, represented by an arrow, has BOTH a direction and a magnitude.

Scalar

A physical quantity that has magnitude only.

Displacement

is a vector quantity that refers to how far out of place an object is. It is the object's overall change in position.

Distance

is a scalar quantity that refers to "how much ground an object has covered" during its motion.

Uniform Motion (steady motion)

The type of motion in which the object travels in a straight line with uniform speed; meaning the velocity remains constant as it covers an equal distance in equal intervals of time.

Accelerated Motion (unsteady motion)

If its velocity changes throughout the course of its motion.

Speed

the scalar quantity of the time rate which an object is moving along a path.

Velocity

the vector quantity that measures the speed of something in a given direction.

All _ fall at the same rate and take the same amount of time to reach the ground if dropped from the same height.

projectiles

Projectile

any object, without wings or a rocket, in the air not touching anything else.

Symmetrical Projectiles

a symmetrical projectile is a projectile that starts and ends at the same height.

T or F // Free-falling objects do not encounter air resistance.

True.

T or F // Free-falling objects do encounter air resistance.

False.

9.8 m/s^2

acceleration due to gravity on earth

T or F // NO free-falling objects (on Earth) accelerate downwards at a rate of 9.8 m/s^2

False, all free-falling object accelerate downwards at a rate of 9.8 m/s^2.

What are the three ways you can see acceleration?

a change in velocity (speeding up or down), a change in direction, or a change in both velocity and direction