S - The coefficient of static friction between the block of 2 kg and the table shown in figure is µ = 0.2. What should be the maximum value of m so that the blocks do not move? Take g = 10 m/s². The string and the pulley are light and smooth. N 2 kg T T F 20 N mg E
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- 23. What is the accelerallof U tIT system? 3.NZ 24. What is the tension on the string? 2 howmor In the following diagram, block B weighs 711 N. The coefficient of static friction between the block and the table is 0.35, and the angle 0 is 30 degrees, assume that the cord between B and the knot is horizontal Ma tan 30 Bo 25. Find the static frictional force ? M. -7.24, 7/1 26. Find the maximum weight of block A for which the system 1-72:5g 98 T Ti కి 1/ will still be stationary. Al m 7, A 5000 kg dump truck has a maximum 400 hp (1 hp 746 W), and it is moving up on an inclined roa slope of 15 degrees. If the frictional coefficient on the road is 0.80, what is the max constant speed that ucker can maintain on the inclined? F v8. A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley may be considered frictionless. The coeffi- cient of static friction between the block and the plane is us; and the coefficient of kinetic friction is k 0 A. g D. g - Hk sin(0) m a. What is the magnitude of the static frictional force acting on the block? B.m g [1 - sin(0)] C. mg D. mg cos(0) B. g - Hk cos(0) A. m g sin(0) E. mg [1 - cos(0)] b. If the rope were cut between the block and the pulley, what would be the magnitude of the acceleration of the block down the plane? C. g [sin(0) - μ cos(0)] sin(0)] c. If the mass of the suspended object is doubled, what will be the acceleration of the block up the plane? B. g [2 tan(0) - uk sin(0)] D. 2g [μ sin(0) - cos(0)] m E. g [tan (0) A. g [2 - μk sin(0)] C. g [2 cos(0) - μ sin(0)] E. g [2 sin(0) Hk Cos (0)]. -17. A force F is used to hold a block of mass m = 4.62 kg on an incline as shown in the diagram. The plane makes an angle of 0 = 26.9° with the horizontal and F is perpendicular to the incline. The coefficient of static friction between the plane and the block is 0.206. What is the minimum force, F, necessary to keep the block at rest? F a. 59.1 N b. 118 N c. 45.3 N d. 19.6 N e. 88.6 N
- A 1380 N was applied to a 271 kg block, find the normal force if the angle 0 = 85.5 degrees. %3D F Select one: a. 2658.5100 N O b. 1282.7641 N O c. 2550.2364 N O d. 2766.7836 NA 125 kg box is pushed up a ramp with a force of 100N applied at a 30 deg below the horizontal. Coefficient of static friction is 0.9. 1. What is the normal force on the box? 2. What is the friction force on the box? 3. What is the largest friction force could be?6. A box is on a ramp inclined at 25° to the horizontal. The coefficient of static friction is .30, and of kinetic friction .20. 1²=30 pe Me=20m a. The box slides down the ramp. b. The box stays on the ramp without slipping. c. The box first slips, but then stays fixed after slowing down. d. We need the mass of the box to answer the question. 3250 www th mg OL M = mg COSTS
- e.co CU ct sona- n ect Pool artment... W 24,919 8. A mass m₁ = 9.00 kg is connected by a light string that passes over a pulley of mass M = 14.0 kg to a mass m₂ = 12.5 kg sliding on a horizontal frictionless surface (see figure). There is no slippage between the string and the pulley. What is the magnitude of the tension that is acting on mass m₂? (The moment of inertia of the pulley is ½/Mr².) N # 3 20 $ 4 R 999 F4 % 5 FS ^ 6 tv © MacBook Air Y & 7 m₂ F7 * 8 Dall 1 ( 9 M m₁ A 02 DD ) 0 P ISULI H by mi 04 M vauies or roe pufferTwo masses are attached with a string passing over a frictionless pulley. mA has mass of 5 kg. mB has mass of 2.5 kg. The coefficient of friction between mA and table is 0.35. 1. What's the weight of mA? 2. Weight of mB? 3.What's the force of friction between mA and the table?Matthew pushes a box of toys along a 5 m long ramp that is inclined 3 m high as shown in the figure below. The box has a total mass of 20 kg and the coefficient friction between the box and the ramp is 0.33. How much force is needed by Matthew to move the box uniformly along the inclined ramp? a. 281.6 Nb. 250.6 Nc. 300.0 Nd. 150.0 N
- You have a coin and you put it 20.0 cm from the middle of a spinning, horizontal turntable slips when its speed anmadı is 20.0 cm/s. What's the statio friction coefficient between the coin and the turntable? a. 0,01 eretle Ob002 Uyg C. 0.085 Kala Od. 0.1 O e. 2DETAILS SERCP9 4.P.017.SOLN. MY NOTES ASK YOUR TEACHER Consider the figure below. (a) Find the tension in each cable supporting the 676-N cat burglar. (Assume the angle of the inclined cable is 31.0°.) Inclined cable N horizontal cable N vertical cable N (b) Suppose the horizontal cable were reattached higher up on the wall. Would the tension in the inclined cable increase, decrease, or stay the same? O Increase O decrease O stay the sameA wniform ladder 15 ft long is leaning against a frnctionless wall at an angle of 53° above the horizontal. The weight of the ladder is 30 pounds. A 75-lb boy climbs 6.0-ft up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor? a. 24 lb b. 34 lb с. 43 lb d. 38 lb e. 47 lb