Structures and Center of Gravity Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Structures and Center of Gravity flashcards as text
Two workers carry a uniform plank by holding its two ends. If a heavy box is placed on the plank closer to worker A, who bears more weight?
Answer: Worker A
The closer support carries more load because the load's weight is distributed inversely to distance from each support.
Where is the center of gravity of a uniform solid sphere located?
Answer: At its geometric center
A uniform sphere has its center of gravity exactly at its geometric center.
A pyramid stands on its wide base. Why is it very stable?
Answer: Low center of gravity and wide base
A wide base and low center of gravity make tipping difficult, giving high stability.
To make a tall stack of blocks more stable, you should add weight where?
Answer: At the bottom
Adding weight at the bottom lowers the center of gravity, increasing stability.
An object tips over when its center of gravity passes beyond what?
Answer: The edge of its base of support
Tipping occurs once the vertical line through the center of gravity falls outside the base of support.
A symmetrical I-beam is supported at both ends with equal length overhangs. Where is its center of gravity?
Answer: At its midpoint
A symmetrical uniform beam has its center of gravity at the midpoint.
Which structure better resists being pushed over by wind: a wide squat building or a tall thin tower of the same weight?
Answer: The wide squat building
The squat building has a lower center of gravity and wider base, resisting overturning better.