The Figure Shows a Right-Angled Construction Frame $A B C$ When Measured at Rest, It Has Dimensions as Follows

question 22

Multiple Choice

The figure shows a right-angled construction frame $A B C$ . When measured at rest, it has dimensions as follows: $A B = 18.9 \mathrm {~m} , A C = 10.0 \mathrm {~m}$ , and $B C = 16.0 \mathrm {~m}$ . This frame is now given a new velocity of $0.420$ c, relative to Earth, in a direction parallel to $A C$ . How long is part $B C$ of this frame with the new velocity as measured by Earth-based engineers?

• A) \(16.0 \mathrm {~m}\)
• B) \(10.0 \mathrm {~m}\)
• C) \(12.0 \mathrm {~m}\)
• D) \(18.0 \mathrm {~m}\)
• E) \(14.0 \mathrm {~m}\)

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