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Pendulum's period on the earth to period on a moon: moon's gravity acceleration.

A simple pendulum, length L, completes 12 oscillations in 30 seconds here on the earth where g= 9.8 nt/kg. The same length pendulum on a certain moon of Jupiter, completes 18 oscillations in 54 seconds. a.) Find the acceleration of gravity, g1, on that moon. b.) Find the weight on the surface of that moon, of a person w

Gravity Work required to move a mass radially outward from the c.m. of a planet

See attachment #1 for diagram showing parameters. A uniform spherical planet has mass M= 8.5 E 25 kg and radius R= 7.5 E 6 m. A hole is drilled from the surface to mass m= 360 kg at an initial position r1= 2.5 E 6 m from the center. PART a. Find the initial gravity force F that the planet exerts on mass m. PART b. F

Physics: Gravity forces and fields between two masses (earth and spacecraft)

See attached file. Assume the earth to be a uniform spherical planet, mass M= (5.98 E 24) kg. (The number, in scientific notation, means '5.98 times 10 to the 24') The earth's radius is R= (6.37 E 6) m. Part a. Find the force of gravity between the earth and a spacecraft whose mass is m= 36000 kg, which is at height h=

Venturi meter readings sphere density.

1a) A venturi meter has 0.02556m^3 of flow per second through its 45mm dia throat.If the pipe is 58mm in diameter,what will the differential reading of mercury across it be? b)A metal sphere 60mm in dia is submerged in oil with a relative density of 0.9.Need to find the density of the sphere.There i

Cube in water: density, volume and force calculations

Imagine that you have a solid cube composed of Material X. You put the cube into a beaker filled with water. The cube sinks to the bottom of the beaker and sits there, at rest, on the bottom. Which of the following statements are true? (Give ALL correct answers: B, AC, BCD, ... , or None) A) The buoyant force on the cub

Gravity and maximum height question.

A ball is thrown straight upward and rises to a maximimum height of 16m above its launch point. At what height above its launch point has the speed of the ball decreased to 1/2 its initial value?