Ele Edit View History tokmarks tools belp Unit 3- Forces and Applicat Test H Exa

Question

Ele Edit View History tokmarks tools belp Unit 3- Forces and Applicat Test H Exam Force X Take Test 1.6 Homework you have book on a tabl €) https/sunyoocopensunyedu/webapps assessmentnakeMaunchip?course assessment id 44628.1&cou; D i as e a Search Show Time v Question Completion Status: of a 200 balance on a see-saw toilers Person Weighs i30 Newfoni the pivot point Newton uniform board Person 2 weighs 27o Newtons and is on the opposite side of the pivot point than person i The board is and is balanced, so it horizontal Person 1 Person 2 0.5m What are the forces acting on the see-saw board? O Type here to search A 621/2017

Explanation / Answer

8.) 'a' is the correct option. weight of both A & B act downwards and at the pivot joint there acts a downward weight of the pulley and all these downward forces are balanced by a normal reaction acting upwards.

9.)b.) is the correct option. Since the pulley is balanced, net torque is zero so both the torques are equal in magnitude and opposite in direction and also neither of them is zero.

10.)torque of person1 = 450 x 0.5 Nm

torque of person2 = 270 x distance

both torques are equal so 450 x 0.5 = 270 x distance

=> distance = 0.83 m

11.) a' is the correct option. the weight of the board(pulley) acts at the joint so torque of this weight is zero. so, there is no need to change the distance of any of them.

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