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An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 57.0 kg and a radius R = 0.625 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of 0.230 m. The tension Tu in the upper (taut) segment of the belt is 158 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find the tension in the lower (slack) segment of the belt.
A potter's wheel having a radius 0.450m and a moment of inertia 15 kg•m2 is rotating freely at 45 rev/min. The potter can stop the wheel in 7.50 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N.
Jill of the jungle swings on a vine 6.5 m long. What is the tension in the vine if Jill, whose mass is 61kg, is moving at 2.4 m/s when the vine is vertical
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.209 m and mass 4.51 kg, what should the radius of the disk be
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
A dc motor is connected to a constant emf of 16.9 V. The resistance of its windings is 2.0 ?. At normal operating speed, the motor delivers 7.1 W of mechanical power. (a) What is the initial current drawn by the motor when it is first started up? (b)..
An atomic nucleus of mass m traveling with speed v collides elastically with a target particle of mass 2m initially at rest and is scattered an 90 degrees. what angle does the target particle move after collision
What is the resistance of a lightbulb that uses an average power of 40.0 W when connected to a 60.0-Hz power source having a maximum voltage of 132 V
A 45 kg trunk is pushed 7.8 m at constant speed up a 30° incline by a constant horizontal force. calculate the work done by the applied horizontal force
Sue and Jim are on ice skates standing 1.30 metre apart on a frozen lake. Sue has a weight of 490 N, What is Sue's velocity and direction after catching the book thrown by Jim
A 36.0 kg child swings in a swing supported by two chains, each 2.90 m long, find the child's speed at the lowest point
A uranium and iron atom reside a distance R = 59.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. what is the magnitude of the force on the electron from the uranium ion
The exterior walls of a house have a total area of 204 m2 and are at 11.4°C and the surrounding air is at 7.4° C. Find the rate of convective cooling of the walls
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