A 650 N Student Attaches A System Of Pulleys And Cords To A 2400 N Crate As Shown In The Figure Below The Student Then 1 (29.99 KiB) Viewed 19 times
A 650 N Student Attaches A System Of Pulleys And Cords To A 2400 N Crate As Shown In The Figure Below The Student Then 2 (24.82 KiB) Viewed 19 times
A 650 N student attaches a system of pulleys and cords to a 2400 N crate, as shown in the Figure below. The student then exerts a constant 200 N force straight downwards on the rope at the left, as shown in the Figure. Assume that the pulleys and cords have negligible weight and that the pulleys are ideal and frictionless T: E A 29. The tension T. equals A 600 N B. 1200N C1800 N D. 2400 N E 3600 N 30. The crate's acceleration is A. 34.3. UP 8. 245 "DOWN C 490 / UP D. 735 / DOWN E ZERO OPTIONAL EXTRA CREDIT QUESTIONS: You may skip these 5 questions entirely answer them in addition to questions in the main body of the exam, or answer them in place of questions in the main body of the eam. I will simply add up the number of correct answers which you submit, divide by 30, and multiply by 100% to obtain your exam score. It is possible to cam 116.67% on this exam! 31. True or False: An object cannot be at rest at a certain instant and yet accelerating? A TRUE B. FALSE 32. True or False: The unit vector i has scalar y-component equal to zero? A TRUE B. FALSE 10
A 1.40 m deep crater was created in a snow bank by a bundle of emergency food supplies which was dropped from a rising helicopter. Suppose that while creating the crater in the snow, the bundle slowed down at an approximately steaty rate of 149x109 m. coming to rest after descending 1.40m into the snow. 14. Which of the following diagrams correctly describes the bundle's motion while it was creating the crater? A) B) *V=0 ду (1.40 my ду ду (1.40 my (1:40 •Vr-0 •Vr-0 D) E) ду ду (1.10 m •V1-0 (1.0m •Vr-0 15. How fast was the bundle traveling just before its impact with the surface of the snowbank? A 14.45 8274 C 204 m, D. 524 £ 980 5
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