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Attached to each end of a thin steel rod of length 1.20 m and mass6.40 kg is a small ball of mass 1.06 kg. The rod is constrained torotate in a horizontal plane about a vertical axis through itsmidpoint. At a certain instant, it is rotating at 39.0 rev/s.Because of friction, it slows to a stop in 32.0 s. Assuming aconstant retarding torque due to friction, compute
(a) the angular acceleration,
(b) the retarding torque,
(c) the total energytransferred from mechanical energy to thermal energy by friction,and
(d) the number of revolutions rotated duringthe 32.0 s.
An oscillator consists of a block attached to a spring (k = 450.0 N/m). At some time t the position (measured from the system's equilibrium location),velocity, What is the mass of the block
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
A very small charged block with a mass of 2.10 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, What is the sign and magnitude of the charge on the block
A doubly charged helium atom whose mass is 6.6 * 10^- 27 kg is accelerated by a voltage of 2400 V. What is its period of revolution
Which one of the following statements regarding internal energy is FALSE?
A ghost leaves a thin slime of ectoplasm (n=1.8) on a puddle of water (1.33). When looking down with light shining on the puddle, What is a possible thickness of the slime
A gun is fired vertically into a 1.40 kg block of wood at rest directly above it. how high will the block rise into the air after the bullet becomes embedded in it
A bullet moving horizontally with a speed of 500m/s strikes a sandbag and penetrates a distance of 10.0 cm. What is the average acceleration , in m/s^2, of the bullet
A 3000 pound car crashes into a concrete jersey barrier moving 3 sections (totaling 12,000 pounds) laterally 24 inches. How fast was the car going on impact.
A VW Beetle goes from 0 to 65.7 mi/h with an acceleration of +2.34 m/s^2. Find the acceleration of the dragster
A copper wire, 1 m long, has a density of 0.020 g/cm and vibrates in 4 segments when under tension produced by a 250 g hanging mass
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