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Two astronauts of equal mass 70 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 14 meters. They are rotating about an axis that passes through the center of mass midway between the two astronauts with angular velocity 0.9 radian/sec. One of the astronauts pulls on the rope, decreasing the distance separating them to 14/2 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?
A service station charges a battery using a current of 6.6A for 4.0h, How much charge passes through the battery
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A student draws the ray diagram shown in the figure but forgets to label the object, the image, which arrow represents the object, and which represents the image
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a man is standing near a gate and a flag pole. The gate is 15 ft from the pole. If the pole is h=35 ft tall, how far is the man from the gate
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A hand grenade is thrown with a speed of v0 30 m/s, and a 60 degree angle with x-axis, just prior to exploding. Find the velocity of the other piece after the explosion
A 1025 kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
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