What are these equations used for? Give a real-world example.

a2 + b2 = c2

?1 + ?2 + 90° = 180°

sin? = opp/hyp and cos? = adj/hyp
and tan? = opp/adj

?y = -1/2g(?t)2

?x = vx ?t

vx = vi cos?

?x = vi (cos?) ?t

vy = vi sin?

Consider the following equation: ?y = vi (sin?)?t – 1/2g(?t)2

What does the first half of this equation
find?

What does the second half of this equation
find?

Why do you subtract the second half?

Consider the following equation: vy,f = vi (sin?) - g?t

a) When would you set vy,f to zero?

b) Give a real-world example when you might
use this.

Consider the following equation: vy,f2 = vi2 (sin?)2 – g?y

How is this different than the equation
above?

Give a real-world example when you might
use this.

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