Ace the 2025 Bennett Mechanical Comprehension Challenge – Tune Your Gears for Success!

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In a rack and pinion system, if the pinion moves in one direction, what happens to the rack?

It moves left

It moves right

In a rack and pinion system, the pinion is a circular gear that engages with the rack, which is a linear gear or bar with teeth. When the pinion rotates, it translates its circular motion into linear motion along the rack.

If the pinion moves in one direction, it forces the rack to move in the opposite direction. The nature of this system is such that for every increment the pinion turns, the attached rack will move a corresponding distance. Thus, if the pinion moves in a specific direction, the rack will always move away from that direction, leading to movement in the opposite way.

In this scenario, if the pinion is moving in a specified direction (let's say to the left), the rack would move to the right. Hence, the correct interpretation of the movement is that the rack moves right when the pinion is engaged and moving as described.

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It does not move

It rotates both ways

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