A spacecraft is measured by a scientist on the ground to have a length of 81 m as it flies overhead with a speed $2.4 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ The spacecraft then lands and its length is again measured by the scientist at rest on the ground.What result does he now get for the length of the spacecraft? (c = 3.0 × 10⁸ m/s)

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The Answer of A spacecraft is measured by a scientist on the ground to have a length of 81 m as it flies overhead with a speed $2.4 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ The spacecraft then lands and its length is again measured by the scientist at rest on the ground.What result does he now get for the length of the spacecraft? (c = 3.0 × 10⁸ m/s)

A Spacecraft Is Measured by a Scientist on the Ground 2.4×108 m/s2.4 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }2.4×108 m/s

A Spacecraft Is Measured by a Scientist on the Ground $2.4 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$