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What is the mass of a ball rolling at 5.00m/s if it has 3.00J of kinetic energy?

Sagot :

Luv2Teach

Answer:

Explanation:

The equation for Kinetic Energy is

[tex]KE=\frac{1}{2}mv^2[/tex] and we know everything but the mass of this ball. Filling in:

[tex]3.00=\frac{1}{2}m(5.00)^2[/tex]. Get everything isolated from the :

[tex]m=\frac{2(3.00)}{(5.00)^2}[/tex] which tells us that we need 3 significant digits in our answer.

m = .240 kg since mass is always in kg i the velocity is in meters/sec

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