Question

The bascule bridge shown is opening from its horizontal position to its fully vertical position. So far, the bridge has lifted 35° in 21 seconds. At
this rate, how much longer will it take for the bridge to reach its vertical position?

Answer 1

The bascule bridge will take another 23 seconds to reach its vertical position from its current lift position of 35°.

How is the time determined?

Using proportion or ratio, one can determine the additional seconds required by the bridge to achieve a vertical position.

The current lift position is 35°, which took 21 seconds.  This implies that the bridge's lift rate is 1.67° per second (21/35°).  To lift to 90°, the bridge will take 54 seconds (1.67 x 90).  Since it has already taken 21 seconds, the bridge requires additional 23 seconds (54 - 21) to complete the vertical lift.

Data and Calculations:

The vertical position of the bridge =  90°

The horizontal position =  0°

Current lift position = 35°

The time it took the bridge to lift 35° = 21 seconds

Therefore, the time it will take the bridge to reach its vertical position from its horizontal position of  90° is 54 seconds (21 x 90/35).

The additional time required by the bridge to reach its vertical position from its current position of 35° is 23 seconds (54 - 21).

Thus, it will take another 23 seconds to reach its vertical position.

Learn more about speed, time, and distance at brainly.com/question/553636

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