John, Harry, Mary and Joan are Biomedical Science majors. John climbs to the sec

Question

John, Harry, Mary and Joan are Biomedical Science majors. John climbs to the second floor to go to had to go to an office on the third floor before heading to class. levator to class. And Mary chose to ride the e ,runs up the stairs to class. What are the potential energies of each of the students. t, John and Joan have the same amount, and Mary has the least. a. Harry's is the highes b. Harry's is the highest, Joan is second since she ran, Harry is third, and Mary has the lea c. Mary is the highest, John is second, Joan is third, and Harry has the least d. Mary is the highest, Joan is second, John is third, and Harry has the least. e. They are all the same. 21. How much wo rk is done carrying a 10 kg object a distance of 50 meters from one classroom to another? a. 500N·m b. 4900N m C. 9800 N·m d. 25N·m e. 0N.m 22. The speed of object triples. What is the change in momentum and energy. a. Momentum triples and energy triples b. Momentum triples and energy is one third c. Momentum Is unchanged and energy triples d. Momentum triples and energy goes up by nine times e. They stay the same

Explanation / Answer

Q20

Potential energy increases with height so

Option (e) is correct as all are in the class finally i.e. same height

Q21

Work done=50*10*9.8=4900 J

Q22

Momentum triples and energy becomes 9 times

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