Answer to Question #12656 in Mechanics | Relativity for mohamed
2012-08-07T11:17:59-04:00
An object of 6 kg mass was at rest. After that a 30 N force is imposed on it. What will be
kinetic energy after 10 sec time?
1
2012-08-10T09:52:01-0400
Let's find the acceleration of an object using the second Newton's law: F = ma ==> a = F/m = 30N /6kg = 5 m/s². The velocity of an object after 10 seconds will be V = at = 5m/s² * 10s = 50m/s. So, the kinetic energy of an object after 10 seconds will be E = mV²/2 = 6kg * (50m/s)² /2 = 7500J.
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