Question

An object has a velocity of 8 m/s and a kinetic energy of 480 j. what is the mass of the object?

Answer 1

KE=1/2*m*v^2
So 480=1/2 * m * 8^2
480=1/2 * m * 64
480=32 * m
480/32=m
15=m

Answer 2

Hello!

We have the following data:

KE (Kinetic Energy) = 480 J
m (mass) = ? (in Kg)
v (speed) = 8 m/s

Formula to calculate kinetic energy:


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

Solving:


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


`480 = (1)/(2) *m*8^2`


`480 = (1)/(2) *m*64`


`480*2 = 64*m`


`960 = 64m`


`64m = 960`


`m = (960)/(64)`


`\boxed{\boxed{m = 15\:Kg}}\end{array}}\qquad\checkmark`