Define:
a. universal gravitational constant.
b. centripetal force.
c. free fall. 29.
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a. The gravitational constant G is a physical constant that appear in the equation for the Newton's law of gravitation:
F=Gm1m2/r^2.
hence the universal gravitational constant is numerically equal to the force of attraction between two bodies of unit mass placed unit distance apart.
b. A centripetal force is a force that makes a body follow a curved path. its direction is always orthogonal ti the motion of the body and towrds the fixed points of the instantaneous centre of curvature of the path.
c. Free fall is any motion of body where gravity is the only force acting upon it. in the context of genral relativity, where gravitation is reduced to space-time curvature, abody in free fall has no force acting on it.
F=Gm1m2/r^2.
hence the universal gravitational constant is numerically equal to the force of attraction between two bodies of unit mass placed unit distance apart.
b. A centripetal force is a force that makes a body follow a curved path. its direction is always orthogonal ti the motion of the body and towrds the fixed points of the instantaneous centre of curvature of the path.
c. Free fall is any motion of body where gravity is the only force acting upon it. in the context of genral relativity, where gravitation is reduced to space-time curvature, abody in free fall has no force acting on it.
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