A rock dropped on the moon will increase its speed from 0 ms to 8.15 ms in about 5 seconds. What is the acceleration of the rock?

The acceleration of the rock can be calculated using the formula: acceleration = (final velocity - initial velocity) / time. Plugging in the values, we get acceleration = (8.15 m/s - 0 m/s) / 5 s = 1.63 m/s^2.