In the system in the figure a = 300 and mA = 4 mB. Calculate: a) - With what acceleration will the system move? b) - If body B is removed and a force F = mB.g is applied to the rope, how much will the acceleration of A be worth in this new scheme? Justify.
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- In the following figure m = 20.0 kg and a622 The coetticient of kinetic friction betwoen the biock and the incline is a -0.40 (Eigure 1) Part A What must be the mass my of the hanging block ifit ia to descend 14.5 m in the tinst 3.00 s after the system is neleaned from rest? Express your anewer with the appropriate units. Figure t of 1 my Value Units Submit Bequest Aner Provide Feedback Next>ore ge.co TED CCU... ect n ol.sona- om bject Pool epartment... 24,919 3 9. A mass m₁ = 19.0 kg is connected by a light string that passes over a pulley of mass M = 14.0 kg to a mass m₂ = 9.50 kg sliding on an inclined frictionless surface that makes an angle of 28° with the horizontal (see figure). There is no slippage between the string and the pulley. What is the magnitude of the acceleration of the system of masses? (The moment of inertia of the pulley is Mr².) m/s² 20 F3 $ 4 % 5 F5 6 tv ♫ e MacBook Air & 7 44 F7 m₂ 8 m₁ 9 O FO O A ISOIH by mi 04 M quies or rne pufferHi I needed help with this. An athlete with a mass of 53.5 kg is doing pushups as shown in the figure below. The value for rW⊥ is 1.00 m and the value for rR⊥ is 1.60 m. (a) Assuming she moves upward at a constant speed, determine the force she must exert on the floor with each hand to do a push-up.(b) The triceps muscle in the back of her upper arm with an effective lever arm of rT⊥ = 1.70 cm, as shown in the figure below, and she exerts force on the floor a horizontal distance of r 'R⊥ = 2.05 cm from the elbow joint. Determine the force in the triceps muscle.In order to appreciate the strength of the triceps, determine the ratio of the force in the tricep muscle to her weight (in decimal form). FT/W = ?
- 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 pufferMA=2Kg Note W= mg Where g= 9.81 m/s" B MB=4 kg Det. the rcceleration. n @ w/c the 4kg bleck B will descodl o iF we 4 kg black B ull desce d iF we nglect Friction on the pulley and also in the horizantal plane. bi) Det the tonsion n the esrd e mea if we neglect Friction. OIF the cocpFicient of Fictioe M=0:36 betueen the block the honzontad plane , determine the tensfon m the card (Show the Oomplett Soutionulation Force - In class TURN IN ools Add-ons Help Last edit was 3 minutes.. ext BIUA 川, 三 Arial 11 1. 2. 6 F 7. rce H=ma hat do I know? Solution? = 300 kg = 4 m/s? 300 kg x 4 m/s? = 1200N 11. A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N opposirg the motion. Calculate the acceleration of the object. What am I looking for? Acceleration Equation? a3F/m What do I know? Solution? 12. A worker drops his hammer off the roof of a house. The hammer has a mass of 9 kg, and gravity accelerates it at the usual 9.8 m/s. How much force does the earth apply to the hammer? Equation? What am I looking for? Force F=ma 目
- 4. An elevator (mass 4850 kg) is to be designed so that the maximum acceleration is 0.0680g. What are the maximum and minimum forces the motor should exert on the supporting cable? : blodged or 11.agli 31 voted 4 DAS to mumixa bosted we pad report AS 5. A load whose mass is 15.0 kg is lowered vertically by a rope. In a given instant, the tension in the rope is 170 N. What is the acceleration of the load? Is it UP, or DOWN? el molenst eritti und to y eqot of Jaloud gil-28 a Mil os hosu gniad el eggs A.C entvom al 31 88.8 begin gated walls bris Jas in betite Soxoud ont acol vo M 388 6. A 1200-kg car starting from rest reaches a speed of 60 mi/h meleons edi Felo S.C in 52.0 s. (a) What is its acceleration (m/s²)? (b) What force is acting upon it? ****Note: 1 mi/h = 0.447 m/sThe 6-m pole ABC is acted upon by a 460-N force, P, as shown in the figure. The pole is held by a ball-and-socket joint at A and by two cables BD and BE. For a = 3 m, determine the tension in each cable and the reaction at A. (Round the final answers to one decimal place.) 3. 1.5 m P E The tension in cable BD is The tension in cable BE is The reaction at A is - ( y C B 3 m N. N. N)i + 3 m 3 m 1.5 m 3 m X N)j + N)k.1.) Consider the pulley system below. Assume M1 = 10kg, and M2 = 40kg. Assume the pulley has no mass and no friction, and the tension force T in the rope is uniform throughout. %3D Calculate: a.) the acceleration of the system. b.) the tension in the rope. m2 m1
- 1. Two pulleys A and B shown are supported by a system of light cords and pulleys, which are frictionless and negligible weight. Block A is 290 kN and B is 880 kN. Calculate the acceleration of each block after release and the tension in the main cord. A ВThe tractor is used to lift the 170-kg load B with the 29-m long rope, boom, and pulley system. The height h=3-m, sA=12m and sg=1.3m. h m SB B SA If the tractor travels to the right with an acceleration of 2 m.s2. The maximum of tension of the allowable tension force in the rope is 2-kN. Determine the maximum of the allowable velocity of the tractor.ANSWERS MUST BE IN 3 DECIMAL PLACES 1. A 400-N body starts up the incline of 30o with the horizontal (fk = 0.2) with a velocity of 3m/s. How long must a 500-N horizontal force act on the body to increase its velocity to 8m/s? 2.. A 400-N body starts up the incline of 30o with the horizontal (fk = 0.2) with a velocity of 3m/s. How far will the body travel while the force is acting?