Question

I've been stuck on this for I little bit now and could use some help:)

Answer 1

The answer would be:

6,250 joules

Here's how to do it:

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

KE = kinetic energy (joules)

m = mass (kg)

v = velocity (m/s)

So with that formula let's figure out what was given to you.

500 kg and 5m/s

You know which is which based on the unit.

m = 500kg

v = 5m/s

Now all you need to do is plug it into your formula and solve.

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

$KE= \frac{1}{2}(500kg)(5m/s)^{2}$

$KE = \frac{1}{2}(500kg)(25m^{2/}s^{2})$

$KE = \frac{1}{2}(12,500kg\cdot m^{2}/s^2})$

$KE = 6,250kg\cdot m^{2}/s^{2}$

The unit $kg\cdot m^{2}/s^{2}$ also means joules

So the final answer is 6,250 joules.