Projectile fired at an angle

Home

By the way, this is a fake

2. Projectile fired at an angle

Projectiles move
in a parabolic path

Baseball Throw
St. Mary's H.S. Physics

Vx and Vy Components
St. Mary's H.S. Physics

*** To understand this type of motion we must breakup the velocity into
horizontal and vertical parts (components)

Angle & Components
St. Mary's H.S. Physics

Finding Horizontal & Vertical Components (parts)

V - velocity of projectile fired

V_ix - initial V in x direction

V_iy - initial V in y direction

Use trig. to find V_ix and V_iy

Since…

COSӨ = A/H = V_ix/V

CROSS MULTIPLY:

Initial Horizontal
Component of Velocity

V_ix = VcosӨ
(on reference table)

Since…

sinӨ = Opp./Hyp. = V_iy/V

CROSS MULTIPLY:

Initial Vertical
component of velocity

V_iy = VsinӨ
(on reference table)

A bouncing ball captured with a stroboscopic flash at 25 images per second.

MichaelMaggs Edit by Richard Bartz

Ex) A baseball is thrown upward at an angle of 30° and a velocity of 6 m/s.
Find the baseball's initial horizontal & vertical velocity.

Vertical Component

V_iy = VsinӨ

=(6 m/s)sin30°

V_iy = 3 m/s up

Horizontal Component

V_ix = VcosӨ

= (6 m/s)cos30°

V_ix = 5.2 m/s across

3. Other important facts

d_x = V_xt

(memorize)

a_y =-9.8 m/s²
ascending (down -)

a_y =+9.8 m/s²
descending
(down +)

V_y at peak = 0

Angles and Ranges

PelletierPhysics

Projectile Range
Don Ion

Minimum Range

0°, 90°

45°

Maximum Range

Angle with Longest time
in Air?

90 degrees

Angle & Components
St. Mary's H.S. Physics

Ex) Which angle of projection causes a projectile to stay in the air longer?

50 or 70 degrees?

70 degrees,

(closest to 90,
longer time in air)

Projectile at an Angle
- Word Problems