Chapter 5 Physics 1

Projectile Motion

Go through these flashcards at least once a day to get an “A”!

• For a vector, the arrow represents the ________ and _______ of the quantity.

magnitude and direction

True or False: Velocity is a scalar quantity

False, it’s a vector quantity

A scalar quantity includes only ___________.

magnitude

Example of a vector quantity

Force, acceleration, velocity

Example of a scalar quantity

Time, mass, volume, speed

An airplane flies in the same direction as the wind. The velocity of the airplane is the sum of the airplane’s velocity relative to the air and the wind’s velocity relative to the ground. True or False?

True

The result of adding two vectors is called the

___________.

The resultant

The resultant of a 3 unit and 4 unit vector that are perpendicular is __________.

5 units

Any vector can be resolved, or broken, into an equivalent set of two______________vectors at right angles to each other.

Horizontal and vertical

True or False? The two perpendicular components of a vector are independent of

one another.

True

The _____ component of velocity in projectile motion always changes with time.

vertical

The relationship between the horizontal and vertical

components of velocity is _____.

Independent. Don’t affect one another.

Ignoring air resistance, the horizontal velocity of a

projectile is ____________.

constant

The vertical motion of a projectile is the same as that of

a _____.

Freely falling object

The path that a ball follows when it rolls off a horizontal

desk is _____.

curved

The path of a projectile with constant horizontal velocity and a downward acceleration due to

gravity is ____.

A parabola

The path of a projectile is called its _____.

trajectory

The curved path of a projectile is caused by _______.

Gravity and (constant horizontal velocity and

increasing vertical velocity)

The equation for the distance a projectile falls below an imaginary straight line is _____.

D=1/2gt2

The vertical component of a projectile’s velocity at the top

of its path is _______.

zero