at 2.5 seconds, the helicopter has a kinetic energy of 20 j. what is the mechanical energy at that time?

  Mechanical energy is the sum of kinetic and potential energy in an object.

We are given that At 2.5 seconds, the helicopter has a kinetic energy of 20 J, Also we know that Energy per time is called the power and is the rate of energy, therefore in order to find the mechanical energy at that time, we will simply divide the values, thus:

Mechanical energy is given as:

Explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year