In the spacecraft,travellers and objects appear floating

Light travels as a

…….is the length of the actual path travelled by an object in motion while going from one point to another

………pairs of ribs are floating ribs.

If a traveler in a spacecraft orbiting the Earth releases an object from his hand,it remains stationary and appears to be in a state of weightlessness.Does this mean there is no force of gravity acting on the object?

Assertion: For a observer looking out through the window of a fast moving train, the nearby objects appear to move in the opposite direction to the trains, while the distant objects appear to be stationary Reason: the observer and the object are moving at velocities v_1 and v_2 respectively with reference to a laboratory frame, the velocity of the object with respect to the observer is vecv_1 - vecv_2 .

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If a traveller releases an object from her hand in the spacecraft,what will happen?

Why dosen't the spacecraft fall towards the Earth?

Answer the following questions Place a coin at the bottom of a glass jar containing water. Now tilt the jar suitably. When viewed at a suitable angle, the coin appears to be floating. Why ?