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1) Suppose a 1400-kg elevator car is lifted a distance 36 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 95 N.
(a) Calculate the work done on the elevator by its cable, in joules.
(b) Calculate the work done by the gravitational force on the elevator, in joules, during this process.
(c) Calculate the total work done on the elevator, in joules.
A 1500 kg elevator moves upward with constant spped through a veticle distance of 25m. Explain how much work was done by the tension in the elevator cable?
Find the radii of synchronous orbits about Jupiter and about the Sun. [Their mean rotation periods are 10 hours and 27 days, respectively. The mass of Jupiter is 318 times that of the Earth. The semi-major axis of the Earth's orbit, or astronomical u..
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