Chapter 3 equation review/resource
Note: Any Greek characters have been replaced with a question mark.  Also, subscripts and superscripts look like plain text.  Please correct these expression before using this material in your classroom.
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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