Question

question 1 (4 points)
(02.01 mc)
solve f = ma for m.
a m = fa
b m = f/a
c m = a/f
d m = f - a
question 2 (4 points)
(02.02 lc)
three motions are listed:
a. an object speeds up
b. an object slows down
c. an object turns
which of the three is considered acceleration?
a a only
b c only
c a and b
d a, b, and c

Explanation:

Step1: Isolate m in F = ma

Divide both sides by a.
$F = ma\Rightarrow\frac{F}{a}=\frac{ma}{a}$

Step2: Simplify the right - hand side

$\frac{ma}{a}=m$, so $m=\frac{F}{a}$

Acceleration is a change in velocity. Velocity is a vector quantity with both magnitude (speed) and direction. When an object speeds up (A), its speed (magnitude of velocity) changes. When an object slows down (B), its speed changes. When an object turns (C), its direction changes. Since a change in speed or direction is a change in velocity, all three (A, B, and C) are examples of acceleration.

Answer:

B. m = F/a