Solution Found!
Very large forces are produced in joints when a person
Chapter 7, Problem 52(choose chapter or problem)
Problem 52PE
Very large forces are produced in joints when a person jumps from some height to the ground. (a) Calculate the magnitude of the force produced if an 80.0-kg person jumps from a 0.600–m-high ledge and lands stiffly, compressing joint material 1.50 cm as a result. (Be certain to include the weight of the person.) (b) In practice the knees bend almost involuntarily to help extend the distance over which you stop. Calculate the magnitude of the force produced if the stopping distance is 0.300 m. (c) Compare both forces with the weight of the person.
Questions & Answers
QUESTION:
Problem 52PE
Very large forces are produced in joints when a person jumps from some height to the ground. (a) Calculate the magnitude of the force produced if an 80.0-kg person jumps from a 0.600–m-high ledge and lands stiffly, compressing joint material 1.50 cm as a result. (Be certain to include the weight of the person.) (b) In practice the knees bend almost involuntarily to help extend the distance over which you stop. Calculate the magnitude of the force produced if the stopping distance is 0.300 m. (c) Compare both forces with the weight of the person.
ANSWER:
Step 1 of 4
We have to find the magnitude of the force in given conditions and we have to compare the net force with weight of the person
According to work energy theorem
Work done = change in energy
…………………….(1)
is the change in kinetic energy
is the change in potential energy