If sam drops a 40 kg mass from a height of 20 meters on earth how much was the potential energy of the mass before he dropped it
a-800 j
b-784 n-m
c-800 n-m
d-7840 j
e- 200 j
dsf
PE = M*g*h =
To calculate the potential energy of an object, you can use the formula:
Potential Energy = mass × gravity × height
In this case, the mass of the object dropped is 40 kg, the gravitational acceleration on Earth is approximately 9.8 m/s², and the height it was dropped from is 20 meters.
So, the potential energy can be calculated as follows:
Potential Energy = 40 kg × 9.8 m/s² × 20 m
Simplifying the calculation:
Potential Energy = 40 kg × 196 m²/s²
Potential Energy = 7840 Joules (J)
Therefore, the potential energy of the mass before it was dropped is 7840 J.
So, the correct answer is (d) 7840 J.