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2 years ago

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A cow standing atop a building in Times Square recalled a funny joke and began to laugh. The uncontrollable laughter caused the

cow to fall over the side of the building. He fell for a time period of 3.5 s and landed in a bed of bushes. How fast was the cow moo-ving when he reached the bushes?
Which equation should be used to solve the problem?

1 answer:

aliina [53]2 years ago

4 0

Answer:

Vf = 34.3 m/s

1st equation of motion was used to solve.

Explanation:

In order to find the final speed of the cow, when it hits the bushes, we can use first equation of motion:

Vf = Vi + gt

where,

Vf = Final Velocity of Cow = ?

Vi = Initial Velocity of Cow = 0 m/s

g = acceleration due to gravity = 9.8 m/s²

t = time taken = 3.5 s

Therefore,

Vf = 0 m/s + (9.8 m/s²)(3.5 s)

<u>Vf = 34.3 m/s</u>

<u>1st equation of motion was used to solve.</u>

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<u>Given that:</u>

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3 years ago

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Answer:

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<em></em>

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where G = gravitational constant = 6.67 x $10^{-11}$ m^3 kg^-1 s^-2

r = the distance between the particles = d

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For electrical repulsion:

Electrical force between the particles = $\frac{-kQ^{2} }{r^{2} }$

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3 years ago

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abruzzese [7]

Answer:

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Given:

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Explanation:

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Substituting values of m & v in the equation:

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3 years ago

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