A baseball that weighs 0.125 kg is thrown at 40.1 m/s. What is the Kinetic Energy of the ball?

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Quizplus · Accepted Answer

Kinetic Energy is the energy an object possesses because of its velocity. Any object that is in motion is using kinetic energy: a child running, a thrown ball, someone skiing down a hill, or a book falling off of a shelf. This is why the equation takes into account the object's mass and the rate at which they are traveling (their velocity). KE = ½ x mv² KE = Kinetic energy (expressed in Joules - J) m = mass (expressed in kilograms) v² = velocity (expressed in meters per second squared) KE = ½ x mv² m = 0.125 kg v = 40.1 m/s KE = ½ x (0.125 kg) x (40.1 m/s)² = 100.5 J which rounds to 101 J *Don't forget to square the velocity*

A Baseball That Weighs 0