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CP A 2.8-kg block slides over the smooth, icy hill shown

Chapter 9, Problem 50P

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QUESTION:

CP A 2.8-kg block slides over the smooth, icy hill shown in Fig. P7.46. The top of the hill is horizontal and 70 m higher than its base. What minimum speed must the block have at the base of the 70-m hill to pass over the pit at the far (right-hand) side of that hill?

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QUESTION:

CP A 2.8-kg block slides over the smooth, icy hill shown in Fig. P7.46. The top of the hill is horizontal and 70 m higher than its base. What minimum speed must the block have at the base of the 70-m hill to pass over the pit at the far (right-hand) side of that hill?

ANSWER:

Solution 50P Step 1: Data given Mass m = 2.8 kg Height h = 70.0 m We know by work energy relation PE = KE We have PE = mgh

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