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A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.20 rev/s.The disk rotates through 3.25 revolutions before coming to rest. What is the tangential acceleration of apoint on the disk 3.50 cm from the axis?
A 2.2kg mud ball drops from rest at a height of 15m .f the impact between the ball, find the average net force exerted by the ball on the ground
Two astronauts, each having a mass of 79.0 kg, are connected by a 10.5 m rope of negligible mass. Calculate the rotational energy of the system
A particular guitar string is supposed to vibrate at 200Hz, but it is measured to actually vibrate at 209Hz. By what percent should the tension in the string be changed to get frequency to the correct value.
The vibration of a system in the ground state is called zero point motion, because the molecule is at zero kelvin. The tips of air plane wings(mass of order 10^4 kg) oscillate in flight (period of 1 s, amplitude of 0.1 m), could this be zero point mo..
An electric motor rotating a workshop grinding wheel at 1.06 102 rev/min is switched off. How long does it take the grinding wheel to stop
A block of mass 12.0 kg slides from rest down a frictionless 33.0° incline and is stopped by a strong spring with k = 2.00 104 N/m. how far has the spring been compressed
You sled down a hill of 45-m vertical height. The combined mass of you and your sled is 130kg. How much work was doen against friction during your decent
Starting from rest, a 5.2-kg blockslides 2.40 m down a rough 30.0°incline. The coefficient of kinetic friction between the block and the incline is µk = 0.436. Determine the work done by the force of gravity.
At what height above the surface of the earth does the balloon have a speed of 7-m/s.
A solid, uniform disk of radius 0.250 m and mass 45.1 kg rolls down a ramp of length 5.20 m that makes an angle of 13.1° with the horizontal. Find the speed of the disk's center of mass when it reaches the bottom of the ramp
A bicyclist of mass 81 kg puts all his mass on each downward-moving pedal as he pedals up a steep road. Take thediameter of the circle in which the pedals rotate to be 0.41 m, anddetermine the magnitude of the maximum torque he exerts.
1 what is the magnitude of the force on a 50 cm 0.500 m long wire carrying 15.0 a at right angles to a 0.005 t 500 g
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