PHYSICS CLASS

ACTIVITY

C.A.: Vo of Marble Launcher

• Determine muzzle velocity of launcher 3 ways:–1) Vertical shoot

–2) Photogate timer

–3) Horizontal shoot

C.A. #6: Marble Launcher Vmuzzle

a = ?

C.A. #6: Marble Launcher Vmuz

Vf = Vo + at

d = Vot + ½ (at2)

Vf 2 = Vo

2 + 2ad

a = g

Ymax = ___

Vmuzzle

Vo

Vf

atd

down up/downup

Find:a) Muzzle velocity

Vimpact

Measure:a) Y max

Vtop = 0 ~ -10 m/s2

Method #1: Vertical Shoot

Photogate TimerPhotogate

Overhead View

Vmuz

Light beam

MarbleTime ???

C.A. #6: Marble Launcher Vmuzzle

Method #2: Photogate Timer

Vmuz

V = d/t

Vmuz = diameter

d = ?diameter

t = ?

t photogate

Photogate

diameter

t = t photogate

C.A. #6: Marble Launcher Vmuz

Horizontal distance (X )

Y= ____

Vmuz

Vo

Vf

atd

YX

Vf = Vo + at

d = Vot + ½ (at2)

Vf 2 = Vo

2 + 2ad

Vfx

Vfy Vf

Goal: Determine Vmuz

Measure: Y, Range

Method #3: Horizontal Shoot

Solve for Final Velocity of Horizontal Shoot

Vfx

Vfy Vf

Vfx = ____

Vfy = ____

Vf = ____

SHOW CALCULATIONS CLEARLY!

Summary of Results