Question

A brick falls freely from a scaffold of 78 m. Assume the ground is the reference point

Calculate the time it takes the brick to fall.

Answer 1

To calculate the time it takes for the brick to fall, you can use the formula t = √(2h/g), where t is the time in seconds, h is the height in meters, and g is the acceleration due to gravity (approximately 9.8 m/s² on Earth). Plugging in the values from the question, the time it takes for the brick to fall is approximately 3.99 seconds.

Step-by-step explanation:

To calculate the time it takes for the brick to fall, we need to use the formula for time in free fall:

t = √(2h/g)

Where:

t is the time in seconds
h is the height in meters
g is the acceleration due to gravity (approximately 9.8 m/s² on Earth)

Plugging in the values from the question:

h = 78 m
g = 9.8 m/s²

We can now calculate the time:

t = √(2 * 78 / 9.8) ≈ √(15.9) ≈ 3.99 s