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A rock is thrown downward from the top of a cliff with an initial speed of 20 m/s. If the rock hits the ground after 5.0 s, what is the height of the cliff? (Disregard air resistance. a =-g=-9.81 m/s2.
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A rock is thrown downward from the top of a cliff with an initial speed of 20 m/s. If the rock hits the ground after 5.0 s, what is the height of the cliff? (Disregard air resistance. a =-g=-9.81 m/s2.)​

（i want step by step)

User James Duffy
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A rock is thrown downward from the top of a cliff with an initial speed of 20 m/s-example-1
User Anatolyevich
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