posted by Melissa .
A 60 kg student does 60 push ups in 40s . With each push up , the student must lift 70% of the body mass a height of 40cm off the floor. Assuming two significant digits, calculate the following
The work the student does against a force of gravity for each push up , assuming work is done only when the student pushes up
The total work done against the force of gravity in 40s
The power achieved for this period