desiree17 desiree17

24-02-2017
Physics

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What is the speed of a 48 kg dog running across a lawn with 216 J of energy?

Respuesta :

24-02-2017

The speed of dog is 3 m/s!!
Explanation:
The mass m of the dog is given as 48 kilograms
And Kinetic energy as 216 joules
As we know K.E = (1/2)mv^2
216 = (1/2) * 48 * v^2
216 = 24 * v^2
v^2 = 216 / 24
v^2 = 9
v = 3 m/s

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