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A roller of radius 300 mm and weighing 2000 N is to be pulled over a curb of height 150 mm as shown in figure by applying a horizontal force F applied to the end of a string wound around the circumference. The magnitude of the force F required to start the roller move over the curb (A) 1732 N (B) 1155 N (C) 2309 N (D) 1468 N

Question-Answer › Category: Engineering Mechanics › A roller of radius 300 mm and weighing 2000 N is to be pulled over a curb of height 150 mm as shown in figure by applying a horizontal force F applied to the end of a string wound around the circumference. The magnitude of the force F required to start the roller move over the curb (A) 1732 N (B) 1155 N (C) 2309 N (D) 1468 N
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Mazurek Gravity Staff asked 12 months ago

A roller of radius 300 mm and weighing 2000 N is to be pulled over a curb of height 150 mm as shown in figure by applying a h
A roller of radius 300 mm and weighing 2000 N is to be pulled over a curb of height 150 mm as shown in figure by applying a horizontal force F applied to the end of a string wound around the circumference. The magnitude of the force F required to start the roller move over the curb (A) 1732 N (B) 1155 N (C) 2309 N (D) 1468 N

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Mazurek Gravity Staff answered 12 months ago

 

Giveno 150 mm F Зоо mm 2 C 4 when collez is about to more, contact between colled & floor (at c) will be lost. 9/15 - Rc=0 FBPA W=200oN Reaction makes an angle of ine with vertical ( 2 Let o=1) a2 x=300 = Now < fy= 0 -2000+ Ra Cos30 =O RA=2309.4 N No

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