Solve the Problem $1.6 \mathrm {~m} / \mathrm { sec } ^ { 2 }$

question 125

Multiple Choice

Solve the problem.
-On our moon, the acceleration of gravity is $1.6 \mathrm {~m} / \mathrm { sec } ^ { 2 }$ . If a rock is dropped into a crevasse, how fast will it be going just before it hits bottom 45 seconds later?

• A) \(3240 \mathrm {~m} / \mathrm { sec }\)
• B) \(- 36 \mathrm {~m} / \mathrm { sec }\)
• C) \(- 72 \mathrm {~m} / \mathrm { sec }\)
• D) \(72 \mathrm {~m} / \mathrm { sec }\)

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