Three boxes slide on a frictionless horizontal surface when pulled by a force of magnitude F. When we compare the tensions FT and Fr,with the force F, we find that F
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- A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to: O W + P cos 0. O W + P sin 0. OW-P sin 0. O W + P. O W. W 0 PIn the figure, the block of mass 2.00 kg accelerates down the inclined plane. The coefficient of kinetic friction is 0.200 and angle of the inclined plane is 30.0°. What is the acceleration of the block? normal force N friction force f mg sine mg cose mg O 3.05 mis? O 5.05 m/s? O 2.05 m/s? O 4.05 m/s?A supermarket pushcart is being pushed at 45 degrees with respect to the horizontal from the starting point to the cashier, which is 25 feet away. The cart is 5kg, it contains 2 boxes of 10-1b flour and seven packs of half-kilogram sugar. The coefficient of friction between the wheels and the floor is 0.03. a. What force is required? b. How much force is required?
- Two rough blocks are at rest on a slope as shown. Block A mass is 5 kg. Block B mass is 10 kg. The coefficient of static friction is 0.5 between all surfaces. y A B 1 20° Bonus 1: What is the magnitude of the static friction force from the slope on B? Bonus 2: What is the magnitude of the static friction force B exerts on A? Bonus 3: What is the magnitude of the static friction force A exerts on B?The 121-lb force P is applied to the 250-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μ = 0.45, μk = 0.36. Answer: F= i lbThe 137-lb force P is applied to the 240-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μ = 0.51, Mk = 0.39. P Answer: F = i Mk lb
- V:r. I ZAY N O O O 1 A A,7IK/s .ll و آذار، ۲۰۲۱ -> o 9:Y. Q1 Block A in the figure below weighs 1.40 N, and block B weighs 4.20 N. The coefficient of kinetic friction between all surfaces is 0.30. Find the magnitude of the horizontal force F necessary to drag block B to the left at a constant speed if A and B are connected by a mass- less cord passing through pulley. A المزيد حذف تعديل مشاركة ...A block with a mass of 7 kg is placed on an incline. If the static friction coefficient between the block and the incline surface is 0.14 and the static friction force is 2.2, what is the maximum angle (in degrees) the incline can be at before the block starts to slide down? FN Fs W = mg50kg steel file cabinet is in the back of a dump truck. The truck’s bed, also made of steel, is slowly tilted. Steel on steel has a coefficient of static friction of 0.60. What is the size of the static friction when the truck bed is tilted 20o?At what angle will the cabinet begin to slide?