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| 40. |
A spring has a
spring constant of 225 N/m. After being compressed 45.0 cm, it is
released to accelerate a 5.00 kg ball. What is the Kinetic Energy of
the ball?
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A. |
22.8 J |
C. |
101 J |
|
B. |
45.6 J |
D. |
202 J |
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Potential
Energy = 1/2 kx2 = 0.5 x 225
N/m x (0.45 m)2 = 22.8 J
The Potential Energy when compressed is equal
to the Kinetic Energy of the ball when released. |
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