zkaitlynli1 zkaitlynli1

11-02-2020
Physics

contestada

a bear has a mass of 500kg and 100,000 J of mechanical kinetic energy. what is the speed of the bear?

Respuesta :

ednorobello92 ednorobello92

11-02-2020

Answer: v = 20 m/s

Explanation: Solution:

Use the formula of Kinetic Energy and derive for v:

KE = 1/2 mv²

To find v:

v = √ 2 KE / m

= √ 2 ( 100000 J ) / 500 kg

= √ 400 m/s

= 20 m/s

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