The motor winds the cable with a constant acceleration, such that the 30 kg crate moves...
In the figure below, a motor winds in the cable with a constant acceleration, such that the 10-kg crate moves a distance s = 3 min 3 seconds, starting from rest. (vo = 0). The coefficient of kinetic friction between the crate and the plane is Mk = 0.3. M A 30° Determine the tension T developed in the cable.
A Review Part A If the motor exerts a constant force of 300 N on the cable, determine the speed of the 30-kg crate when it travels s = 10 m up the plane, starting from rest. The coefficient of kinetic friction between the crate and the plane is uk = 0.3 (Figure 1) Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 п μΑ ? M m V= 39 s = 10...
2. The crate has a mass of 100 kg and rests on the surface for which the coefficient of kinetic friction is 0.25 and the coefficient of static friction is 0.35. If the motor supplies an increasing cable force until the crate moves, and maintains this force magnitude afterwards. Determine (a) the initial acceleration of the crate, (d) the power output developed by the motor when t 2 seconds. The motor has an efficiency of 0.85.
If the 50-kg crate starts from rest and travels a distance of 6 m up the plane in 4 s, determine the magnitude of force P acting on the crate. The coefficient of kinetic friction between the crate and the ground is μk = 0.25.
2. A 300 kg crate is pulled starting from rest by a motor and a pulley and string. The motor is pulling with a force 3T, where, T = 120t2 + 3. kinetic friction of coefficient, pk = 0.4; static coefficient of friction H = 0.3. Determine the speed of the crate after 6 s. (10 pts) 3T
If the motor draws in the cable at a rate of v = 0.05t^2, where t is in seconds. The crate has a mass of 20 kg and the coefficient of kinetic friction between the crate and the ground is mu_k = 0.2. The acceleration of the crate in m/s^2 and the developed in the cable after 5 s in N are
A factory worker moves a 30.0 kg crate a distance of 4.5 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.25. 1. What magnitude of force must the worker apply? 2. How much work is done on the crate by the worker's push? 3. How much work is done on the crate by friction? 4. How much work is done by normal force?...
The 750 kg elevator is operated as the cable winds around the rotating drum (r=0.2 m) A which is driven by a motor. Determine the constant torque M which must be supplied to the shaft of the drum by the motor in order to give the elevator an upward velocity of 3 m/s in a vertical rise of 4 m starting from rest. Neglect the mass of the drum and assume it is in rotational equilibrium (constant rotational speed). Neglect...
4. The 20-kg crate is subjected to a force having a constant direction and a magnitude m, the crate is moving to the right with a speed o Determine its speed when s 25 m. The coefficient of kinetic friction between the crate and the ground is μ 0.25 30°
Work on a sliding crate. A worker pushes a 47.0 Kg crate across a level horizontal floor by applying a constant force of exactly 150.0 N at an angle of 23.0 degrees below the horizontal. The crate begins at rest and ends 15.0m from where it started traveling at 2.6m/s A. What is the work done by the applied force as the crate moves across the floor? B What is the work done by the friction force as the crate...