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marta [7]
4 years ago
7

the kinetic energy of a bowling ball is 25 (kg-m^2/sec^2). if the mass is 2 kg, the what is the speed of the bowling ball

Physics
1 answer:
ollegr [7]4 years ago
8 0
K=0.5m×u×u
25=0.5×u×u
u=5m/s
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What is the magnitude of the total acceleration of point A after 2 seconds? The bar starts from rest and has a constant angular
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Answer:

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Explanation:

The total acceleration of a body, if we use the Pythagorean theorem is

          a_total² = a_T²2 + a_{c}²

where

the centripetal acceleration is

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tangential acceleration

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we substitute in the first equation

       a_total = √ [(α r)² + (w r² )²]

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we substitute

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In order to finish the calculation we need the radius to point A, suppose that this point is at a distance of r = 1 m

         a_total = 2,236 m

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