You want to lift a heavy box with a mass L = 91.0 kg using the two-ideal pulley system as shown. With what minimum force do you have to pull down on the rope in order to lift the box at a constant velocity? One pulley is attached to the ceiling and one to the box. L kg N
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- An object that weighs 45 N is on a ramp angled 27 degrees above the horizontal. What is the parallel component of gravity acting on the object? E What is the perpendicular component of gravity acting on the object? What is the normal force the ramp exerts on the object? CheckcA large box of mass M is pulled across a horizontal, frictionless surface by a horizontal rope with tension T. A small box of mass m sits on top of the large box. The coefficients of static and kinetic friction between the two boxes are μs and μk, respectively. ▼ Part A Find an expression for the maximum tension Imax for which the small box rides on top of the large box without slipping. Express your answer in terms of the variables M, m, μs, and appropriate constants. VE ΑΣΦ T = Submit Previous Answers Request Answer ?
- Plz use g = 9.8 m/s22. A two body system is set up on an inclined surface with M = 5 kg and m = 4 kg. The angle is 25 degrees. And the static frictional coefficient is 0.25, and kinetic frictional coefficient is 0.20. i. Find the parallel and perpendicular components of the Mg. ii. Find the static frictional force and kinetic frictional force. iii. Determine which way the system will move, uphill or downhill. iv. Once it starts, find the tension T =? v. Once it starts, find the acceleration, a=?Suppose you use an ideal pulley of the type shown in image (a) in the figure below to support a car engine of mass 145 kg. MA-2 MA-3 MA-4 Ο (b) (c) (a) What would be the tension in newtons in the rope? N (b) What force in newtons must the ceiling supply, assuming you pull straight down on the rope? Neglect the pulley system's mass. N
- Suppose a 58.5 kg gymnast climbs a rope. What is the tension in the rope if she climbs at a constant speed? tension: What is the tension in the rope if she accelerates upward at a rate of 1.25 m/s²? tension: Nt Three blocks are connected by massless ropes that move without slipping over frictionless pulleys; the mass of block A is 1.4 kg, the mass of block C is 2.1 kg, and the mass of block B is 6.0 kg. Each pulley can be modeled as a uniformly dense cylinder with a mass of 4.0 kg. What is the magnitude of the tension (in N) in the rope between block A and the pulley? rd A 1 B C Type your answer... Submitx Incorrect The force P is applied to the 30-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 85 N, and (c) P = 131 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are us = 0.18 and µk = 0.12, respectively. The friction force is positive if up the incline, negative if down the incline. %3D P 30 kg 18° H, = 0.18 H = 0.12 12 Answers: (а) F 3D N (b) F (c) F = (d) P =
- Ⓒ Macmillan Learning A jet airplane is in level flight. The mass of the airplane is m = 8950 kg. The airplane travels at a constant speed around a circular path of radius R = 8.89 mi and makes one revolution every T = 0.118 h. 0 Given that the lift force acts perpendicularly upward from the plane defined by the wings, what is the magnitude L of the lift force acting on the airplane? At what angle is the airplane banked? L = 0 = R Enter numeric value kNA 40 N box is resting on a table when a 20 N force is applied to it horizontally. The coefficients of static and kinetic friction are 0.3 and 0.1, respectively. Which of the following best describes the resulting motion of the box? The motion of the box cannot be determined with the given information. The box accelerates in the direction of the applied force. The box remains at rest. The box moves with a constant velocity in the direction of the applied force.ebAssign 110 N 40 ASK YOUR TEACHER 3. DETAILS SERCP11 4.7.P.065.MI. Objects with masses m, = 15.0 kg and m, = 8.0 kg are connected by a light string that passes over a frictionless pulley as in the figure below. If, when the system starts from rest, m, falls 1.00 m in 1.78 s, determine the coefficient of kinetic friction between m, and the table. 4. DETAILS SERCP11 5.2.OP.015. ASK YOUR TEACHER A 7.80 g bullet is initially moving at 620 m/s just before it penetrates a block of wood to a depth of 5.80 cm. (a) What is the magnitude of the average frictional force (in N) that is exerted on the bullet while it is moving through the block of wood? Use work and energy considerations to obtain your answer. (b) Assuming the frictional force is constant, how much time (in s) elapses between the moment the bullet enters the block of wood and the moment it stops moving?