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A wheel rotates about a horizontal axis. It has an outerradius R1= 21.2 cm and mass M1=4.51 kg. Attached to itconcentrically is a hub of radius R2= 4.70 cm and mass M2 = 1.16kg. The axle has negligible radius and mass. Both the wheel and thehub are solid and have uniform density. Suspended from a masslessstring that is wound around the hub is a weight of mass m = 484 gm.a) What is the acceleration of the hanging weight after it isreleased? b) when the weight has fallen a distance of 73.1 cm, what is the kinetic energy of the rotating wheel?
A 800kg car pushes a 1900kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 5000N . Rolling friction can be neglected.
A 208 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg?K, the heat of fusion for cop..
Three identical freight cars are sitting on the tracks, each separated by a small distance. A fourth car is coasting with velocity 4 m/s. How fast are the four cars moving
A 71.9-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a)accelerating upward with an acceleration of 1.92 m/s2,(b) moving upward at a constant speed, and(c) accelerating downward with an acceleration of..
at some point in space,the x and y components of the electric field are Ex= 1.73 N/C, respectively and Ey= 3.75 N/, respectively. What is the net charge of the particle
In compressing the spring in a toy dart gun, 0.4 J of work is done. What is the dart's kinetic energy as it leaves the gun
A brick hangs from a string attached to the ceiling. When a horizontal force of 15 N is applied to the brick, What is the mass of the brick
A current of 16.0A flows through an electric heater operating on 120 V. Compute the power consumption of the electric heater
Two blocks with masses M1=7.90kg and M2=1.20kg are attached by a thin string which goes over a frictionless, Calculate the magnitude of the frictional force acting on M1
a particle is moving along a straight line with the acceleration a 12t-3t12fts2 where t is in seconds.determine the
Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 17.0m/s. As a result of this collision, the two cars become enmeshed and move as one af..
A car travels at 35.0 m/s for 40.0 minutes and then travels at 55.0 m/s for 20.0 minutes. What is the average velocity of the car
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