Open and run the Active Physics Tutorial 5.1. Work the calculations and answer t
ID: 2297486 • Letter: O
Question
Open and run the Active Physics Tutorial 5.1. Work the calculations and answer the questions.
(1) Open and run the simulation, which shows a crate being pulled up an incline.
Determine the work done by the cable with tensions 12N while it is pulling the crate 4.0m up the 37 degree incline. When you are finished with the calculations, select the answer choice that is closet to your answer.
(a) 29 J
(b) 38 J
(C) 48 J
(2) Open and run the next simulation, which shows the crate being lowered.
Determine the work done by the cable with tension 12N while lowering the crate 4.0m down the 37 degree incline. When you
are finished with your calculation, select the answer choice below that is closest to your answer.
(a) 48 J
(b) 38 J
(c) - 38 J
(d) - 48 J
(3) Open the next simulation, which shows a small skydiver.
The small skydiver, weighing 50N, sinks 1.0m into the snow when her parachute does not open. The magnitude of the
average force of the snow on the person while she is sinking into the snow is 300N. Determine the work done by the snow
in stopping . When you are finished with your calculation, select the answer choice that is closest to your answer.
(a) 300 J
(b) 50 J
(C) - 50 J
(d) - 300 J
NOTE: Please show all work on calculation with explanation.
Explanation / Answer
1.) Work = Force x distance. Since Force is in the direction of travel the: cos (0) = 1. so 12N x 4.0m x cos(0) = 48J
2.) Force is in the opposite direction of travel: cos(180) = -1, so 12N x 4.0m x -1 = -48J
3.) Force is in the opposite direction of travel: cos(180) = -1, and Force and distance are always positive, so 300N x 1.0m x cos(180) = -300J
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