Question

An model leans off a bridge railing to take a picture and accidentally drops their phone. The phone's mass is 0.115 kg and the bridge is 15 m tall. The instant the model dropped the phone, it's mechanical energy is 16.9 joules? why?

Answer 1

Answer:

Explanation:

according to einstein's formulae E=mc2  1kg of mass is equivalent to (9joules  when rounded off )

in this situation we ignore the bridge height and work hand in hand with the relativity and force

so...if you do the conversion you will find the suitable answer which is 16.9J