
QUESTION 24 An elevator of total mass 200 kg is supported by a single cable, as...
A single cable supports an 703-kg elevator car. What is the tension in the cable when the car is moving with constant speed? What is the tension in the cable when the car is moving with an upward acceleration of 3.50 m/s2? What is the tension in the cable when the car is moving with a downward acceleration of 3.50 m/s2?
4) Find the tension in an elevator cable if the 1000 kg elevator is descending with an acceleration of 2.8m/s^2 downward. 6) A 0.15 m radius grinding wheel starts at rest and develops an angular velocity of 12.0 rad/s in 4 sec. What is the average tangential acceleration of a point on the wheels edge? 7) A point on the rim of a 0.25 m radius wheel has a centripetal acceleration of 4.0 m/s^2. What is the angular velocity of...
An elevator with a person in it is being pulled upwards by a massive cable. Identify all interaction forces (consistent with Newton's 3rd Law) in the system. Specify the object the force acts on. a label for its magnitude and its direction. Consider your system to consist of the cable, the elevator, the Earth and the person. For example, the Earth pulls down on the elevator with force Melevator9 and the elevator pulls up on the Earth with force Meievatorg?-...
An elevator cab is pulled upward by a cable. The cab and its single occupant have a combined mass of 2000 kg. When that occupant drops a coin, its acceleration relative to the cab is 4.00 m/s2 downward. What is the tension in the cable?
QUESTION 24 A truck of mass 3000 kg moves around an unbanked corner of radius 81.2 m. If the coefficient of static friction between the truck tires and the road is 0.800, what is the maximum speed that the truck can move without slipping, in units of m/s? QUESTION 25 Find the mass of an object, in units of kilograms, if a resultant force of 11.2 N will give it an acceleration of 2.00 m/s. QUESTION 26 What is the...
A laboratory freight elevator,
including its load, has a mass of 500 kg. It is prevented from
rotating by the track and wheels mounted along its sides. The
elevator is used to carry highly sensitive equipment so it cannot
exceed an acceleration of 3 m/s2 . A geared motor is used with the
cable/pulley system shown below to raise and lower the elevator.
The motor turns gear A with a constant angular acceleration, αA.
The gears of the motor have...
Use any concepts you've learned about to answer this question. A ball of mass m = 0.5 kg moves around in a circle of radius r = 2 meters, at speed [v] = 1 m/s. a) What is the centripetal acceleration, ac, in m/s2? b) What is the work done by the force of tension in Joules, on the ball, if it has moved by half the circle? c) What is the kinetic energy of the ball, in Joules?
A ball of mass 4.4 kg is attached to a pole by two ropes: a horizontal rope under tension T1, and a rope under tension T2 which makes an angle 0 = 44.6 degrees with the vertical as shown in the diagram. The ball moves in a horizontal circle of radius L = 1.9 at constant speed of V| = 19.2 m What is the tension T? Answer in Newtons (N).
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? T w Both forces are equal. (b) When the elevator is moving at a constant velocity upward, which is greater, T or w? T w Both forces are equal. (c) When the elevator is moving upward, but the acceleration...
A small object of mass 0.500 kg is attached by a 0.800 m-long cord to a pin set into the surface of a frictionless table top. The object moves in a circle on the horizontal surface with a speed of 8.17 m/s. a) What is the magnitude (m/s2) of the radial acceleration of the object? b) What is the tension (N) in the cord?