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Newton's derived his law of universal gravitation by considering moon and earth , so why we use his law everywhere ?
a sphere of mass 40 kg is attracted by another sphere of mass 15 kg wit a force of 1/10 mg wt. find the value of gravity if centers of spheres are 20 cm apart
What is the formula to create a black hole?
A dog of mass m is standing on the edge of a stationary, frictionless turntable of rotational inertia I and radius R. The dog walks once around the turntable. What fraction of a full circle does the dog’s motion make with respect to the ground?
A 17-kg dog is standing on the edge of a stationary, frictionless turntable of rotational inertia 95 and radius 1.81 m. The dog walks once around the turntable. What fraction of a full circle does the dog’s motion make with respect to the ground?
A potter’s wheel, with rotational inertia 6.40 is spinning freely at 19.0 rpm. The potter drops a 2.70-kg lump of clay onto the wheel, where it sticks a distance of 46.0 cm from the rotation axis. What is the subsequent angular speed of the wheel?
A particle of mass m moves in a straight line at constant speed v. Show that its angular momentum about a point located a perpendicular distance b from its line of motion is regardless of where the particle is on the line.
What is the magnitude of the angular momentum associated (a) with Earth’s rotation about its own axis and (b) with its revolution about the Sun? See Appendix E, and consider Earth to be a uniform sphere.
How far, in parsecs, is an object that has a parallax p of 0.010 arc-second? How
far is it, in light-years?
If Jupiter is 5.2 AU from the Sun, how many kilometers is it from the Sun?
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