Question

Please answer all parts especially C and D. Thanks

Before Christmas a 65kg student consumes 2500 Cal each day and stays at the same weight. For three days in a row while visiting her parents she eats 3500 Cal and, wanting to keep from gaining weight decides to work off" the excess by jumping up and down at the Christmas tree. With each jump she accelerates to a speed of 3.2 m/s before leaving the ground. a) How high will she jump each jump? b) How many jumps must she do to keep her weight? Assume that the efficiency of the c) d) Possible enhancement: What other way/ways would you suggest for the student body in using energy is 25% Do you suggest that is a reasonable way for the student not to gain weight over Christmas? to keep her weight?

Answer 1