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# 2.A 60-kg student does 60 push-ups in 40 s. With each push-up,the student must lift an average of70% of the body mass a height of 40 cm off the floor. Assuming twos...

## Question

###### 2.A 60-kg student does 60 push-ups in 40 s. With each push-up,the student must lift an average of70% of the body mass a height of 40 cm off the floor. Assuming twosignificant digits, calculate thefollowing:(a) the work the student does against the force of gravity for eachpush-up, assuming work is doneonly when the student pushes up(b) the total work done against the force of gravity in 40 s(c) the power achieved for this period.

2.A 60-kg student does 60 push-ups in 40 s. With each push-up, the student must lift an average of 70% of the body mass a height of 40 cm off the floor. Assuming two significant digits, calculate the following: (a) the work the student does against the force of gravity for each push-up, assuming work is done only when the student pushes up (b) the total work done against the force of gravity in 40 s (c) the power achieved for this period.

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