Question

If Alvin jumps off a cliff into the lake below, and it took him 2.8s to hit the water, what is the height of the cliff?

A) 14 m
B) 38 m
C) 77 m
D) 27 m

Answer 1

The height of the cliff is 38 meters.

Step-by-step explanation:

To calculate the height of the cliff, we can use the formula for free fall motion: h = (1/2)gt^2, where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time. In this case, the time is given as 2.8s. Plugging these values into the formula, we get h = (1/2)(9.8)(2.8)^2.

Calculating this gives us h = 38m, so the height of the cliff is 38 meters.