* Distance: You would measure the total distance the rock falls in those 5 seconds.
* Time: You would measure the time it takes for the rock to fall that distance, which is given as 5 seconds.
* Acceleration due to gravity: You wouldn't directly measure this, but you could calculate it. You know the rock starts from rest (0 m/s) and reaches a speed of 8.15 m/s in 5 seconds. Using the formula:
* Acceleration (a) = (Final Velocity (v) - Initial Velocity (u)) / Time (t)
* a = (8.15 m/s - 0 m/s) / 5 s = 1.63 m/s²
This calculated acceleration of 1.63 m/s² is the acceleration due to gravity on the moon.
Important Note: You wouldn't be able to directly measure the rock's velocity (speed and direction) at every instant of its fall. You would need special equipment like a high-speed camera or a motion sensor to do that.
