3 years ago

An object has kinetic energy of 324 J. If it’s speed is 9m/s, what is it’s mass?

Physics

2 answers:

harkovskaia [24]3 years ago

6 0

It is 8 kilograms

I had to type more so here you go

Illusion [34]3 years ago

3 0

Answer:

8 kg.

Explanation:

Remember that the formula to calculate the kinetick energy is half of the mass mutiplied by the squared velocity:

$Ke= .5mv^2$

So in order to solve this problem we will have to solve the equation for mass:

$M=\frac{324J}{.5*81} \\m=\frac{324}{40.5}\\ m=8 kg$

So by clearing the equation you now know that the answer is that there are 8 kg in an object that is moving at 9m/s and has a kinetic energy of 324J.

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