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An object with a mass of m = 4.8 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.225 m and mass of M = 3.00 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing through its center as shown in the figure below. The suspended object is released from rest 5.80 m above the floor.
(a) Determine the tension in the string.
(b) Determine the magnitude of the acceleration of the object.
(c) Determine the speed with which the object hits the floor.
A 15 N block lifted straight upward by a hand applying a force of 15 N has an initial kinetic energy of 7 J. What is the block's final kinetic energy
The focal length of an objective lens is 4.60mm . The image formed by this lens is 145mm from its focal point. find the magnitude of the angular magnification of the microscope
An Australian emu is running due east in a straight line at a speed of 17.6 m/s and slows down to a speed of 15.7 m/s in 7.7 s. Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed?
An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz. What is the average power dissipated in the circuit
A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 67.0-gram mass is attached at the 14.0-cm mark, What is the mass of the meter stick
What is the greatest possible distance from the wall
Two particles are fixed on an x axis. Particle 1 of charge 51.50 μC is located at x = -33.2 cm; particle 2 of charge Q is located at x = 10.10 cm. Particle 3 of charge magnitude 37.7 μC is released from rest on the y axis at y = 11.30 cm.
Two resistors are connected in a series to a 15V battery. The voltage drop across the first resistor is 3.5V, What is the resistance of the two resitors
A Sodium surface, which has a work function ? of 2.46 eV is illuminated with ? = 300nm light. Find the threshold frequency for Sodium
A skier (m=63.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 6.10 m and D = 12.2 m, find H.
The leg and cast weigh 200 N, with the center of mass as indicated by the blue arrow. The counterbalance w1 weighs 110 N. find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
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