Question

the object at point a has a potential energy of 270 j and a kinetic energy of 810 j. what is the total energy?
height (m) vs. time (s)
options: 1080 j, 980 j, 1180 j

Explanation:

Step1: Recall total energy formula

Total energy ($E_{total}$) is the sum of potential energy ($E_{p}$) and kinetic energy ($E_{k}$), so $E_{total}=E_{p} + E_{k}$.

Step2: Substitute given values

Given $E_{p}=270\ \text{J}$ and $E_{k}=810\ \text{J}$, then $E_{total}=270 + 810$.

Step3: Calculate the sum

$270+810 = 1080\ \text{J}$.

Answer:

1080 J