Explanation:
<h2><u>All</u><u> </u><u>voi</u><u>ce</u><u>. </u><u>wi</u><u>th</u><u> </u><u>wri</u><u>te</u><u> </u><u>n</u><u> </u><u>in</u><u> </u><u>English</u></h2>
<span> Allied Forces. they became the allies.</span>
Answer:
(a) the runner's kinetic energy at the given instant is 308 J
(b) the kinetic energy increased by a factor of 4.
Explanation:
Given;
mass of the runner, m = 64.1 kg
speed of the runner, u = 3.10 m/s
(a) the kinetic energy of the runner at this instant is calculated as;
(b) when the runner doubles his speed, his final kinetic energy is calculated as;
the change in the kinetic energy is calculated as;
Thus, the kinetic energy increased by a factor of 4.
I would say Lava.
Hope this helps. :)
Friction is the force exerted when 2 (or more) objects rub up against each other.