The Earth has a mass of approximately 80 times that of the Moon. The distance between their centers is on average 384000 km. How far from the center of the Earth is the center of mass of the Earth-Moon system?
A. Not enough information is given
B. 4800 km
C. 4860 km
D. 4740 km
D. 4740 km
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A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m. The incline has a coefficient of kinetic friction of 0.200. The work done by the pushing force is
A. 475 J. B. 422 J. C. 356 J. D. 300 J. E. 396 J.
Describe some of the features of Mercury's surface and briefly explain how these features are believed to have formed
What will be an ideal response?
A spaceship is traveling to the Moon. At what point is there no more gravitational force exerted on it by Earth?
A) when it gets above the atmosphere B) when it is half-way there C) when it is closer to the Moon than it is to Earth D) There is no point where there is no more gravitational force exerted on the spaceship by Earth
An initially installed flywheel can store 106 J of kinetic energy when rotating at 300 rad/s. It is replaced by another flywheel of the same size but made of a stronger material. If its mass is the same as that of the original, and it is now capable of achieving a rotational speed of 600 rad/s, what maximum energy can be stored?
a. 40 × 10^5 J c. 10 × 10^5 J b. 20 × 10^5 J d. 5.0 × 10^5 J