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A 38-kg boy running at 3.7m/s jumps tangentially onto a small circular merry-go-round of radius 2.0 m and rotational inertia 20 kg m2 pivoting on a frictionless bearing on its central shaft. Merry-go-round initially rotating at 0.70 rad/s opposite the direction that the boy was running before he jumped on it.
1. Find the change in the boy's kinetic energy.
2. Find the change in the kinetic energy of the merry-go-round.
3. Decide the rotational speed of the merry-go-round after the boy jumps on it.
4. Discover the change in kinetic energy of the system consisting of the boy and the merry-go-round.
A physical pendulum is constructed using a 2.35kg object having a moment of inertia of 27 kg-m2 aboutits center of mass. The rotation (suspension) point is 850.3 cmfrom the center of mass. What is the period of this physical pendulum?
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
Perfectly, when a thermometer is utilized to measure the temperature of an object, the temperature of the object itself must not change. However, if a important amount of heat flows from the object to the thermometer, the temperature will change.
Two cars are traveling along a straight road. Car A maintains aconstant speed of 82 km/h and car Bmaintains a constant speed of 90 km/h.At t = 0, car B is 39 kmbehind car A. How much farther will car A travel before car B overtake sit?
four charged particles are fixed in place at the corners of a square with side length 1.20 meters. the square is
A sinusoidal voltage ?v = (65 V) sin (140t) is applied to a series RLC circuit with L = 50 mH, C = 150 ?F, and R = 42 ?.
Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 7.0 g.Silver has 47 electrons per atom, and its molar mass is 107.87g/mole.
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
An outside loudspeaker (considered a small source) emits sound waves with a power output of125W. Find the intensity10.5m from the source.
An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. what is the velocity of the fluid in the narrow section
A person with mass mp = 75.0 kg stands on a spinning platform disk with a radius of R = 1.77 m and mass md = 188.0 kg. The disk is initially spinning at ? = 1.5 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.59..
A 2.0 centimeter high object is 15 centimeter in front of a converging lens that has a 30 centimeter focal length. Find what is the image position
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