Answer:
A cinder block is stationary it means it only has potential energy.
Step-by-step explanation:
- The cinder block is not moving so it has been storing the potential energy.
- We can find the potential energy of the block by using the formula as:
Potential energy (PE) = mgh
where,
m= mass of the block
g= acceleration due to gravity
h= height of the block
Now,
PE= 79 × 20 J
or, PE = 1580 J
The energy stored by the block as potential energy is 1580 J.