A ROCK WITH A WEIGHT OF 156.8 NEWTONS FALLS 5 METERS. WHAT POTENTIAL ENERGY DOES IT HAVE JUST BEFORE THE END OF ITS FALL.
To calculate the potential energy of the rock just before the end of its fall, you can use the formula for potential energy:
Potential Energy = Mass x Acceleration due to gravity x Height
In this case, we have the weight of the rock, which is equivalent to its mass multiplied by the acceleration due to gravity (9.8 m/s^2). The weight is given as 156.8 Newtons, and we have the height of 5 meters.
First, we need to determine the mass of the rock. We can do this by dividing the weight by the acceleration due to gravity:
Mass = Weight / Acceleration due to gravity
Mass = 156.8 N / 9.8 m/s^2
Mass ≈ 16 kg
Now that we know the mass, we can calculate the potential energy:
Potential Energy = Mass x Acceleration due to gravity x Height
Potential Energy = 16 kg x 9.8 m/s^2 x 5 m
Potential Energy ≈ 784 J (Joules)
Therefore, the potential energy of the rock just before the end of its fall is approximately 784 Joules.