Question

K=1/2 mv squared, determined m when v=30 and k=4500.

Answer 1

Given the expression:

$\text{ k = }\frac{1}{2}mv^2$

At v = 30 and k = 4,500 , let's determine m.

$\text{ k = }\frac{1}{2}mv^2$$\frac{2k}{v^2}\text{ = m }\rightarrow\text{ m = }\frac{2k}{v^2}$

We get,

$\text{ m = }\frac{2k}{v^2}$$\text{ = }\frac{2(4,500)}{(30)^2}$$\text{ = }\frac{9,000}{900}$$\text{ m = 10}$

Therefore, m = 10.