Question

The mass of an object with 500 J of kinetic energy moving with a velocity of 5 m/s is kg.

Answer 1

The answer is 40 kg

Step-by-step explanation:

You will this formula below:

m=
`(2*\\KE)/(v^(2) )`

Now we know our formula, now we plug in the given numbers:

m=
`(2(500J))/((5m/s)^2)`

Simplify and we get:

m=40 kg

I hope this was helpful.

Answer 2

`m=20kg`

Step-by-step explanation:

Hello,

In this case, we define the kinnetic energy as:

`K=(1)/(2) m*v^2`

Thus, for finding the mass we simply solve for it on the previous equation given the kinetic energy and the velocity:

`m=(2*K)/(v^2)=(500kg*(m^2)/(s^2) )/((5(m)/(s))^2) =(500kg*(m^2)/(s^2) )/(25(m^2)/(s^2))\\\\m=20kg`

Best regards.