Preston Meadow's Height Enhancement Blog

Math problems Kinetic + potential energy?

1. It is said that Galileo dropped objects from the Leaning Tower of Pisa to determine whether heavy or light objects fall faster. If Galileo had dropped to 5.0 kg cannonball to the ground from a height of 12 m, which would have been the change in the PE (potential energy) of the cannonball? I just want to check if the correct answer for this. 2.The 2000 Belmont Stakes, commendable, ran the race of horses at an average speed of 15.98 m / s. If commendable and jockey Pat Day had a combined mass of 550.0 kg, what was the KE (kinetic energy) across the goal? I know the formula for this, but I come out with a long number Uber for a reason.

An object of the gravitational potential energy is calculated using mgh, where m is the mass, g is the gravitational constant (9.81 for the Earth) and H is height in meters. Therefore, the change in grav. pot. energy is 5 x 9,81 x 12, which is 589J. – The formula for kinetic energy is 0.5 (m) (v ^ 2) – use this service: 0.5 x 550 x 15.98 ^ 2 = 70224J or 70.2kJ. I hope help!

Horse Jockey of Artemision by Heinrich Eder BildhauerEder

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