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An elevator moves downward in a tall building at a constant speed of 4.95 m/s. Exactly 5.50 s after the top of the elevator car passes a bolt loosely attached to the wall of the elevator shaft, the bolt falls from rest
a) At what time does the bolt hit the top of the still-descending elevator? (Assume the bolt is dropped at t = 0 s.)
b) Estimate the highest floor from which the bolt can fall if the elevator reaches the ground floor before the bolt hits the top of the elevator. (Assume 1 floor congruent 3 m.)
A 2.0 kg, 20-cm-diameter turntable rotates at 100 rpm on frictionless bearings. Two 500 g blocks fall from above, What is the turntable's angular speed
A flywheel 0.400 m in diameter pivots on a horizontal axis. A rope is wrapped around the outside of the flywheel, and a steady pull of 80.0 N is exerted on the rope. What is the angular acceleration of the flywheel
A small, spherical bead of mass 2.90 g is released from rest at t = 0 from a point under the surface of a viscous liquid. The terminal speed is observed to be vT = 1.76 cm/s.\ (a) Find the value of the constant b in the equation = ?b. (b) Find the ti..
The power P of an Electric circuit varies jointly with resistance , R and with the square of the current, I. find the power if the current is 2.00 A and the resistance is 2.00 ohms
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the speed of the elevator just before striking the spring
The density of a 2.69-m long rod can be described by the linear density function ?(x) = 109 g/m + 11.3x g/m2. Determine the total mass of the rod
When 4625 J of heat are added to a 0.13-m-long silver bar, its length increases by 4.59 10-3 m. What is the mass of the bar
Light from an argon laser strikes a diffraction grating that has 6600 grooves per centimeter. The central and first-order principal maxima are separated by 0.320 m on a wall 1.00 m from the grating. Determine the wavelength of the laser light.
A 294 N force is pulling an 82.6-kg refrigerator across a horizontal surface. The force acts at an angle of 24.4 ° above the surface. calculate the work done by the kinetic frictional force
A guitar string with a linear density of 2.0 g/m is stretched between supports that are 60 cm apart. What is the frequency of the fifth harmonic of this string
A person weighs 75 N on the surface of the moon and 427 N on the surface of the Earth. What is the acceleration of gravity on the surface of the moon
Find A (Vector potential of the Magnetic dipole) on a diagonal of a square side S and of current I at a distance Sqrt(2)S from the corner.
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