Bennett Mechanical Test Structures and Center of Gravity 2

Question 1

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?

Accepted Answer

Worker A

Answer

The closer support carries more load because the load's weight is distributed inversely to distance from each support.

Question 2

Where is the center of gravity of a uniform solid sphere located?

Accepted Answer

At its geometric center

Answer

A uniform sphere has its center of gravity exactly at its geometric center.

Question 3

A pyramid stands on its wide base. Why is it very stable?

Accepted Answer

Low center of gravity and wide base

Answer

A wide base and low center of gravity make tipping difficult, giving high stability.

Question 4

To make a tall stack of blocks more stable, you should add weight where?

Accepted Answer

At the bottom

Answer

Adding weight at the bottom lowers the center of gravity, increasing stability.

Question 5

An object tips over when its center of gravity passes beyond what?

Accepted Answer

The edge of its base of support

Answer

Tipping occurs once the vertical line through the center of gravity falls outside the base of support.

Bennett Mechanical Test Practice Test