Question

A rock falls off an 80-meter cliff at an average speed of 3.5 m/s. How long did it take to hit the ground? Is it 0.044 seconds?

Option A: 8 seconds
Option B: 16 seconds
Option C: 24 seconds
Option D: 32 seconds

Answer 1

The rock took approximately 22.86 seconds to hit the ground.

Step-by-step explanation:

To find the time it takes for the rock to hit the ground, we can use the equation:

distance = average speed * time

Since the rock falls off an 80-meter cliff, the distance is 80 meters.

So, we can rearrange the equation to solve for time:

time = distance / average speed

Plugging in the values we have, time = 80 meters / 3.5 m/s = 22.86 seconds. Therefore, the rock took approximately 22.86 seconds to hit the ground.