Tuesday, October 23, 2007

Solutions to Projectile Motion Sheet

A soccer ball is kicked....
t = 2.1s (use distance = vi*t + 1/2 at^2)
Vi = 16.7m/s (use distance = v * t)

A long jumper...
time = 1.1s (find the time it takes to get the peak using Vf = Vi + at, and double it)
horizontal distance = 11.66m
Vertical distance = Vit+1/2at^2 = 1.6m

A small mass...
Horizontal component of velocity: 40*cos35 = 32.8
Vertical component of velocity: 40*sin35 = 22.9
Time to peak = 2.3s (Vf = Vi + at)
Distance to peak = initial distance plus projectile = 46.7 m
Vertical Distance = 173m

Automobile accident...
time = .35s
Velocity = 13.1m/s

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