On a hot day, Dave is relaxing by the pool. He touches the concrete next to the pool and then touches the surface of the water. Which one do you think felt hotter to Dave? Explain your answer.

the concrete because the concrete absorbs the suns energy, making it hot

Explanation:

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initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft