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Which condition arises within a rapidly accelerating spacecraft because of Einstein's equivalence principle?

A)Gravitational effects become locally indistinguishable
B)Inertial mass cancels gravitational mass
C)Relativistic mass plateaus near lightspeed
D)Temporal deceleration matches spatial acceleration

💡 Explanation

The equivalence principle states that gravitational and inertial forces are indistinguishable; therefore, a uniformly accelerating reference frame mimics a uniform gravitational field, because all laws of physics, and therefore their outcomes if you are dropping an apple, will respond equivalently, rather than experiencing different acceleration profiles.

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