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coldgirl [10]
3 years ago
8

Three-fourths of the elements on the

Physics
1 answer:
77julia77 [94]3 years ago
8 0

Answer:

b

Explanation:

because the metalloids are the thing in the middle

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A _____ increases or decreases voltage in a power line
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A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starti
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Answer:

Velocity of the ball after 3.04 (s) = 29.79 (m/s)

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From the free fall movement we have the following formulas: Vf^{2} = Vo^{2} - 2gh and h=Vo*t - \frac{g*t^{2} }{2}, First we need to find the height to time iqual to 3.04 s using the formula: h=Vo*t - \frac{g*t^{2} }{2} and remember that golf ball was released from the rest (Vo= 0 (m/s)) so h= (0 (m/s))*(3.04 (s)) - \frac{9.8 (m/s^2)*(3.04 (s))^{2} }{2}, we get: h = -45.28 (m) with the height that we have got, now the velocity of the ball is calculate using Vf^{2} = Vo^{2} - 2gh solving for Vf, we get: Vf = \sqrt{Vo^{2}-2*g*h } replacing the values given Vf = \sqrt{(0 m/s)^{2}-2*(9.8 m/s^2)*(-45.28 m) }, so we get: Vf = 29.79 (m/s).

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The gravitational potential energy U is defined as the product of mass m, the acceleration of gravity g and the height of object h.

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