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A playground merry-go-round of radius 2.00 meter has a moment of inertia I = 290 kg•m2 and is rotating about a frictionless vertical axle. As a kid of mass 25.0 kilogram stands at a distance of 1.00 meter from the axle, the system (merry-go-round and child) rotates at the rate of14.5 rev/min. The kid then proceeds to walk toward the edge of the merry-go-round. Find the angular speed of the system when kid reaches the edge?
rad/s
A 270 g ball at the end of a string is revolving uniformly in a horizontal circle of radius 0.51 m. The ball makes1.7 revolutions in one second. What is the speed of the ball as itgoes around in the circle?
a 9.5-kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. as an approximation assume a
A spacecraft in a circular orbit wishes to transfer to another circular orbit of quarter the radius by means of a tangential thrust to move into, Find the thrust factors required
A 0.90 m diameter wagon wheel consists of a thin rim having a mass of 7.00 kg and six spokes each having a mass of 1.40 kg. Determine the moment of inertia of the wagon wheel
A 10-kilogram block of southern pine 30 centimeter on a side is held submerged under water. Determine what force is required to do this
Many radioisotopes have important industrial, medical, and research applications. One of these is 60Co, which has a half-life of 5.20 years and decays by the emission of a beta particle, What is the minimum number of nuclei in the source at the tim..
A coil of wire that is 3.0cm in diameter has 1500 turns is in a magnetic field that goes from0 T to 0.5 T in 5 ms. The axis of the coil is parallel to thefield. What is the emf of the coil?
A map of a burned area obtained from remote sensing contains 120 pixels. The remote sensing image shows that the fire is isolated to 73 of the 120 pixels.
A sound is set up in a pipe closed at one end and open atthe other. According to the formula given by Dr. Willis in class,when n=3 how much of a wavelength is in the pipe?
A barefoot field-goal kicker imparts a speed of 23 m/s to a football initially at rest. estimate the force exerted by the ball on the kickers foot
a damped harmonic oscillator involves a block (m=2kg) ,a spring (k=10N/m)and a damping force F=-rv. How much energy is lost during these five cycles
Consider a large chemical storage tank that is 100 ft in diameter and 25 feet tall. What is the force exerted by the fluid on the base of the tank
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