e A spaceship of mass m travels from the Earthto the Moon along a line that passes through the center of theEarth and the center of the Moon. (a) At what distance from thecenter of the Earth is the force due to the Earth twice the magnitude of the force due to the Moon? (b) How does your answer topart (a) depend on the mass of the spaceship? Explain
Rigid Body
A rigid body is an object which does not change its shape or undergo any significant deformation due to an external force or movement. Mathematically speaking, the distance between any two points inside the body doesn't change in any situation.
Rigid Body Dynamics
Rigid bodies are defined as inelastic shapes with negligible deformation, giving them an unchanging center of mass. It is also generally assumed that the mass of a rigid body is uniformly distributed. This property of rigid bodies comes in handy when we deal with concepts like momentum, angular momentum, force and torque. The study of these properties – viz., force, torque, momentum, and angular momentum – of a rigid body, is collectively known as rigid body dynamics (RBD).
e A spaceship of mass m travels from the Earth
to the Moon along a line that passes through the center of the
Earth and the center of the Moon. (a) At what distance from the
center of the Earth is the force due to the Earth twice the magnitude of the force due to the Moon? (b) How does your answer to
part (a) depend on the mass of the spaceship? Explain
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