Question

A 3 rock is falling off a 66 meter cliff. Calculate the kenetic energy once it has fallen 6 meters from its
original position.
(Use g=9.8, and record your answer to the nearest whole number)

Answer 1

Answer:

The potential energy of the rock at the top of the cliff can be calculated using the formula:

PE = m × g × h

Where:

PE = potential energy

m = mass of the rock (assumed to be 3 kg)

g = acceleration due to gravity (given as 9.8 m/s²)

h = height of the cliff (66 meters)

PE = 3 kg 9.8 m/s² 66 m

PE ≈ 1922.4 Joules

The kinetic energy of the rock when it has fallen 6 meters from its original position can be calculated as:

KE = PE at the top - PE at 6 meters

KE = m × g (h1 - h2)

Where:

h1 = initial height (66 meters)

h2 = final height (6 meters)

KE = 1922.4 - 3 kg 9.8 m/s² × 6 m

KE ≈ 1922.4 - 176.4

KE ≈ 1746 Joules

So, the kinetic energy of the rock when it has fallen 6 meters from its original position is approximately 1746 Joules.