Physics Honors Quiz 1A

Kinematics

• Branch of physics

• Describes the motion of objects

• Doesn’t focus on the forces that cause motion

Kinematic quantities

• Distance

• Displacement

• Speed

• Velocity

• Time

Scalar

• Quantity with only magnitude

• No direction

• Ex. 60 m/s

Scalar quantities

• Speed

• Distance

• Time

Vector

• Quantity with both magnitude and direction

• Ex. 60 m/s east

Vector quantities

• Displacement

• Velocity

• Acceleration

One Dimensional Motion

• Moves along a straight line

• Car moving down a straight road

• Includes negative, 0, positive

Distance

• Total length of the path traveled

• Positive or zero

• Scalar

• meters

Displacement:

• Change in position from starting point to ending point

• Vector

• Δx = xᶠ − xᵢ

• meters

Speed

• How quickly an object moves

• speed = distance ÷ time

• v = d/t

• scalar

• 30 m/s

Average speed:

• Average speed = total distance / total time

Velocity:

• The rate an object changes its position in a specific direction

• Vector (positive or negative)

• Direction

• Velocity = Displacement / Time

• -30 m/s

Velocity formula:

v = d/t

Distance formula:

d = vt

Time formula

t = d/v