A 10 kg wheel with a moment of inertia of 0.162 kg. m² about its center is released from rest on an inclined plane at 60°. Originally, the coefficient of kinetic friction is μ=0.30, causing the wheel to slip. Find the minimum coefficient of friction necessary for the wheel not to slip. 200 mm 60° -0.30
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- Calculate the horizontal force P required to push the 85-lb lawn mower at constant speed. The center of gravity of the mower is at G, and the coefficients of rolling resistance are 0.12 for the front wheels and 0.18 for the rear wheels.The solid homogeneous cylinder shown has a mass of 30 kg and is rotating at 1200 rpm clockwise about a fixed horizontal axis through O. The coefficient of kinetic friction between the brake and the cylinder is 0.20. If the tension in the spring when the brake is applied is 100 N, determine the time required for the cylinder to stop rotating. Neglect the thickness of the vertical members. (Draw FBD)Motiyo Add explanation
- O Week6 Friction_21-22.pdf ds/Week6_Friction_21-22.pdf 4. The mine car and its contents have a total mass of 6000kg and a centre of gravity at G. If the coefficient of static friction 10 kN Doo→ between the wheels and the 0.9 m • G tracks is u = 0.4 when the wheels are locked, find the normal force acting on the front wheels at B and the rear /0.15 m A 0.6 m 1.5 m- wheels at A when the brakes at both A and B are locked. Does the car move? [Ans. NA = 16.5 kN, Ng =42.3 kN, the car does not move] ily TWO WAY POWER 09889 NO MODE SETUPConsider the system of two blocks. Thereis no friction between block A and the tabletop. The mass of block B is5.00 kg. The pulley rotates about a frictionless axle, and the light ropedoesn’t slip on the pulley surface. The pulley has radius 0.200 m andmoment of inertia 1.30 kg . m2. If the pulley is rotating with an angularspeed of 8.00 rad/s after the block has descended 1.20 m, what is themass of block A?The cart and its contents have a total mass of 4500 kg and a center of gravity at G as shown in Figure Q4. The coefficient of static friction between the wheels and the tracks is µ, = 0.4 when the wheels are locked. The normal forces acting on the wheels at (A and B) are independent as to whether the wheels are locked or not. Therefore, 10kN G 0.9 m A20.15 m : 0.6 m 1.5 m Figure Q4: The cart. (a) Draw the free-body diagram of the system. (b) Calculate the normal force acting on the front wheels at B when the brakes at both A and B are locked.
- Mass = 147 kg coefficent of friction= 0.37 h = 4 mProblem 4: This box is placed on a turntable at a distance r = 4.2 meters from the center axis. The turntable is originally at rest. At time t = 0, the turntable begins to rotate at a constant angular acceleration of 0.2 rad/s². Find the time at which the box begins to slip if the static coefficient of friction between the box and the platform is 0.58. r合 目 PO Week6 Friction_21-22.pdf ads/Week6_Friction_21-22.pdf 4. The mine car and its contents have a total mass of 6000 kg and a centre of gravity at G. If the coefficient of static friction 10 kN between the wheels and the 0.9 m • G tracks is u = 0.4 when the wheels are locked, find the normal force acting on the front wheels at B and the rear %3D A. /0.15 m B. 0.6 m- -1.5 m- wheels at A when the brakes at both A and B are locked. Does the car move? [Ans. NA = 16.5 kN, Ng =42.3 kN, the car does not move] ily
- Answer all parts pleaseThe uniform rod has a mass of 10 kg and rests on the inside the smooth ring at B and on the ground at A as shown in Figure Q3. Calculate the friction of static friction between the rod and the ground if the rod is on the verge of slipping. 0.5 m 0.2 m 30 A Figure Q3A uniform slender bar AB with a mass of 20 kg and length of 3.6 m leans on a wall as shown. It is attached to a weightless small roller at end A on a smooth horizontal surface. The coefficient kinetic friction between end B and the wall is 0.25. If the bar is released from rest in the position shown when θ is 30°. Then find, determine the normal force at A. determine the normal force at B. determine the frictional force between end B and the wall.