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By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows, with m1 = 12.2 kg and m2 = 42.8 kg. The pulley can be treated as a uniform, solid, cylindrical disk. The downward acceleration of the 42.8-kg block is observed to be exactly one-half the acceleration due to gravity. Noting that the tension in the rope is not the same on each side of the pulley, find the mass of the pulley.
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; What is the period of the spacecraft's orbit
A 50cm long non-conducting cylinder of radius 4cm has a volume charge density of 30 uC/m^3. A grounded conducting cylindrical shell of radius 6cm is placed concentrically around the charged cylinder.
A copper wire, whose cross-sectional area is 5.22 x 10-6 m2, has a linear density of 5.86 x 10-3 kg/m and is strung between two walls. At the ambient temperature, a transverse wave travels with a speed of 43.1 m/s on this wire. The coefficient of ..
A solid 2.5 kg ball with a radius 30 cm sits at top of ramp which is at an angle of 30 degrees from the floor. How much energy does the ball have at the bottom of the ramp
A skier slides horizontally along the snow for a distance of 27 m before coming to rest. how fast was the skier going
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do not
An Olympic high jumper wants to cross a bar 1.9 m off the ground while mantaining a velcity of 1.48 m/s. How fast does she have to run to accomplish this
A charged capacitor is connected to an inductor. At time t=0 the charge on the capacitor is Q= 6uC. What is the amplitude of the current at that same instant
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.1 kg and 2.08 × 10-3 m3, Find the mass of the gold in the rock
A circus cannon, which has a mass M = 5000 kg, is tilted at q = 30°. The cannon is now lowered to shoot horizontally. It fires the same projectile at the same speed relative to the cannon. With what speed does the cannon now recoil with respect to ..
A runaway railroad car, with mass 30 x 10^4 kg, coasts across a level track at 1.5 m/s when it collides with a spring loaded bumper at the end of the track, What is the maximum displacement of the spring after the collision
Two objects (01 and 02) have equal ammounts of electric charge Q on each of them. each object is located in the same electric field, the electric , the electric field having a magnitude of e.
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