just having issues with parts C and D Namet . The Green Goblin has sabotaged an

Question

just having issues with parts C and D

Namet . The Green Goblin has sabotaged an elevator with Mary Jane Watson inside, and Spiderman springs into ction to save hen Spiderman grasps the cable o stop the elevator from crashing to the ground. Spiderman pulls on the cable stops the elevator, then continues pulling on the cable so that the elevator is moving upward at a steadily increasing speedt A. 13 points) What is the direction of the net force on the elevator? If there is no (3 points) ls the normal foree exerted on Mary Jane by the elevator greater Eath? Explain how you know D. l points) Draw two free-luly diagrams: one for the clevator and one for Mary Jane. Be sure your frece- Ibde diagrams are to the same scale, and that you label which one is for Mary Jane and which one is for the elevator dlie the eletr FBD For ?1), 12 points! Identify any Newton's 3"Law force pains) on the free body diagrams you just drew by marking cach force with an"x." Earned Points: Possible Points: 14 Page 1

Explanation / Answer

1. a. as the spider man is pulling up on the string to stop the elevator and then pull it upwards

henc enet force on the elevator is upwards

b. now, since the net force on the elevator is upwards

net force on people inside the elevator is also upards

this force F is given by F = N - mg

N = F + mg

hence, normal reaction is greater than the weight of the person

hence the normal force is greater than the gravotational force

c. the FBD for elevator is to the left ( already drawn on paper)

there is force of gravity, there is upward force of trension and net upward force is +ve

for mary jane

force of gravity, and upward normal reaction, with net upward force +ve

d. newtons third law pair force in this are

downward force on the elevaot ( that we combined with the weight for the total downward force) is equal to the upward normal reaction on mary jane

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