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The crane shown in the drawing is lifting a 174 kg crate upward with an acceleration of1.7 m/s2. The cable fromthe crate passes over a solid cylindrical pulley at the top of theboom. The pulley has a mass of 130 kg. The cable is then wound ontoa hollow cylindrical drum that is mounted on the deck of the crane.The mass of the drum is 150 kg, and its radius is 0.76 m. Theengine applies a counterclockwise torque to the drum in order towind up the cable. What is the magnitude of this torque? Ignore themass of the cable.
Nm
Calculate momenta before collision of the objects with masses m1=10g and m2=20g, moving with speeds v1=2m/s and v2=7m/s
A space vehicle is traveling at 3570 km/h relative to Earth when the exhausted rocket motor is disengaged, What is the speed (in km/h) of the command module relative to Earth just after the separation
in the cathode ray tube in an old television set, electrons are accelerated from rest with a constant acceleration of magnitude 7.31*10^13 m/s2 during the first 2.77cm of tube's length; find the speed of the electron when they hit the screen
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
An object with a charge of -2.6 \mu C and a mass of1.7×10−2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to itsweight.
Two waves with identical frequency but different amplitudes A1= 5.0cm and A2 = 3.0 cm, what is the amplitude of the resulting wave if they interfere constructively
In the hydrogen atom the radius of orbit B is 16 times greater than the radius of orbit A. What is the total energy of the electron in orbit B
The emissivity of tungsten is 0.35. A tungsten sphere of radius 1.5 cm is suspended within a large evacuated enclosure whose walls are at 300 K. What power input is required to maintain the sphere at a temperature of 3000 K
An airplane is flying in a horizontal circle at a speed of 100 m/s. The 80.0-kg pilot does not want her radial acceleration to exceed 7g. (a) What is the least radius of the circular path? (b) At this radius, what is the force causing the centripe..
A racing dog is initially running at 15.0 m/s, but is slowing down. How fast is the dog moving when its kinetic energy has been reduced by half
The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated, What is the specific heat of the metal
question1air is blown throughout a circular and horizontal venturi tube. the diameters of narrow and wider sections of
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