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Apiece of concrete pipe being stored at a construction site is shaken loose in an earthquake and rolls down a hill. The pipe is a cylindrical shell 2.0 m is diameter, 3.2m long and 5 cm thick. Concrete has a density of roughly 2300 kg/m3. When the pipe reaches the street after descending a vertical distance of 45m, how fast is it going?
A cylindrical section of tree trunk 50 cm in diameter and 75 cm long is seen rolling down a road below a saw hill at a speed of 12 m/s. (wood has a density of about 750 kg/m3) Assuming that the road has an incline 5% (meaning that if you travel 100 m along the slope of the road, you go up 5 m), at least how far up the road is the sawmill? Describe any assumptions or approximations that you make.
A basketball with a mass of 0.15 kg and a radius of 0.15 m is thrown to you rotating at 5 times per second. What is the magnitude of the frictional force that you have to exert on it with your hands to stop it rotating within 0.1s when you catch it? (Hint: the moment of inertia of a spherical shell is 2/3 MR2, where M and R are the shells mass and radius, respectively.)
a long thin solenoid has 55 turnscm and carries a current of 0.212 a. the solenoid is filled with iron and the magnetic
A long straight ideal solenoid of radius 6 cm, with 150 turns/m passes (on axis) through the center of a flat circular coil, What is the total flux across the coil, as a function of time
A ball is thrown from the window of a high-rise building with an initial velocity of 5.1 m/s at an angle of 22 deg. below the horizontal. Find the height from which the ball was thrown
Almost the entire volume of mercury in a thermometer is contained in the bulb. The remainder extends up into a capillary tube. Find the inner radius of the capillary tube
An object is launched at 30 with initial speed of v = 30m/s. a) When does it reach the highest point of the projectile? b) What is the range of the flight? c) What the maximum height it reaches? 30. An object is moving with constant speed of v = 3..
A -50 micro C charge is located at (+26 cm, 0) on the + x axis and a +50 micro C charge is located at (-26cm, 0) on the -x axis. Calculate the net electric field and the total electric potential
When a resistor is connected across the terminals of an acgenerator (115 V) that has a fixed frequency, there is a current of 0.665 A in the resistor. When an inductor is connected across the terminals of the same generator, there is a current of ..
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
Air at 90 kpa and -10 C enters an adiabatic diffuser steadily with a velocity of 180 m/s and leaves with a low velocity at a pressure of 100 kpa. The exit area of the diffuser is 4 times the inlet area. Determine (a) the exit temperature and (b) the ..
a meter rule hangs motionless supported at 30cm mark. It has a 0.02kg mass hanging from the 0meter mark
53.53 J of heat are removed from a gas sample while it is being compressed by a piston that does 52.01 J of work. What is the change in internal energy of the gas
A glass lens has a convex surface with radius 25.0 cm and a concave surface with a radius of 50.0 cm. Calculate the focal length of this lens
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