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Two astronauts of equal mass 76 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 18meters. They are rotating about an axis that passes through the center of mass midway between the two astronauts with angular velocity1 radian/sec. One of the astronauts pulls on the rope, decreasing the distance separating them to 18/2 meters. (In the following, take the rope to be massless.)
a) What is the new angular velocity of the two astronauts?
b) How much work did the astronaut who pulled on the rope do?
The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. Evaluate how far does he slide?
A small steel ball bearing with a mass of 17g is on a short compressed spring. When aimed vertically and suddenly free, spring sends the bearing to a height of 1.33 m. compute the horizontal distance ball would travel if the same spring were aimed..
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the final equilibrium temperature of the tin- water mixture.
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, What is the increase in the entropy of the universe
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Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Conclude the volume of each cube.
Two rockets, A and B, approach the earth from opposite directions at speed 0.60c. What is the length of rocket A as measured by the crew of rocket B
A circular loop of wire of resistance R= .500 ohms and radius r=8.00cm is in a uniform magnetic field out of the page, Find the rate at which the field is changing
Attaching this non-ideal voltmeter decreases the voltage across R2. Calculate the magnitude of this decrease using an emf of 14 V and R1 = R2 = 350 k?
A 0.51T magnetic field is perpendicular to a circular loop of wire with 50 turns and a radius of 13cm, what is the magnitude of the induced emf
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