a rolling ball has 18 joules of kinetic energy and is rolling 3 m/s. find its mass
To find the mass of the rolling ball, we can use the formula for kinetic energy:
KE = 0.5 * m * v^2
where KE is the kinetic energy, m is the mass of the object, and v is the velocity.
Plugging in the values into the formula:
18 = 0.5 * m * (3)^2
18 = 0.5 * m * 9
18 = 4.5 * m
m = 18 / 4.5
m = 4
Therefore, the mass of the rolling ball is 4 kg.