A 6400-kg elevator has a maximum acceleration of 2.5 m/s?. Calculate the minimum diameter steel cable needed to support the elevator.
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- Two blocks are joined by an inextensible cable as shown. If the system is released from rest, determine the velocity of block A after it has moved 2 m. Assume that the coefficient of kinetic friction between block A and the plane is 0.25 and that the pulley is weightdess and frictionless. 200 kg ㄱ 300 kg A BYou find yourself stranded on the middle of a frozen pond. The surface is so slick you are unable to get any traction. In an effort to save yourself, you take off your boot and throw it toward the west. This results in... A. you staying put. B. you sliding off to the east slower than the boot's speed. C. you sliding off to the east faster than the boot's speed. D. you sliding off to the west faster than the boot's speed. E. you sliding off to the west slower than the boot's speed.Do it fast
- A small engine causes a 0.20-kg model airplane to accelerate at a rate of 12 m/s2 . What is the net force on the model airplane? A. 2.4 N B. 60. kg•m/s C. 2.4 kg•m/s D. 60 NThe slope of the 4.1 kN force F is specified as shown in the figure. Express F as a vector in terms of the unit vectors i and j. Assume a = 9, b = 3. Answer: F = (i it i j) KNq7 help please
- In the figure, the resultant of all forces in x-direction is equal to a 30° zero O ma mg sin 30 mg39. A 12 kg book is pushed fror rest to a final velocity of 10 m/s The book travels óm. How much net force was the book pushed with? O 600 N O 1200 N 200 N O 100 N O OFrom the figure, evaluate: a. g in terms of a and b b. f in terms of b and c C. e in terms of c and d d. e in terms of f, g and h D a e d C