You and two friends, Sam and Todd, are rock climbing in the wilderness. Todd is stranded at
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Question:
1. (10 points) Sam suggests using the two single pulleys as shown below in Figure 1.
a) Do you have enough rope for this?
b) Will Sam be able to safely lower you down the cliff using this setup?
c) Will Sam be able to safely lift both you and Todd back to the top using this setup? Todd also has a mass of 75 kg and Sam can pull on the rope with the same 300 N force.
2. (8 points) You instead propose using the block and tackle as shown below in Figure 2.
a) Do you have enough rope for this?
b) Will Sam be able to safely lift both you and Todd back to the top using this setup?
c) After looking carefully at the block and tackle you find that it is damaged and cannot be used.
What can you do instead to safely rescue Todd and is it feasible in this case?
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