Question

K=1/2 mv^2. Determine m when v=30 and k=4500

Answer 1

$K=\frac{1}{2}mv^2$

when v=30 and k=4500
$4500=\frac{1}{2}m(30)^2$
$4500=\frac{1}{2}m900$
$4500=450m$
divide bot sides by 450
$10=m$


m=10

Answer 2

k = 1/2mv^2.....v = 30, k = 4500

4500 = 1/2m30^2
4500 * 2 = 900m
9000 = 900m
9000/900 = m
10 = m <==