A 1-Kg Rock Is Suspended from the Tip of a Horizontal

question 54

Multiple Choice

A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so that the meterstick barely balances like a seesaw when its fulcrum is at the 12.5-cm mark. From this information, the mass of the meterstick is

• A)1/4 kg.
• B)1/2 kg.
• C)3/4 kg.
• D)1 kg.
• E)none of the above

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Definitions:

Echinoderms

A phylum of marine animals known for their radial symmetry and include species such as starfish, sea urchins, and sea cucumbers.

Hermaphrodite

Animal that has both male and female gonads, either simultaneously or at different times in its life cycle.

Parthenogenetic

Relating to a form of reproduction in which an embryo is created without fertilization by a male, occurring in some plants, invertebrates, and rarely vertebrates.

Sperm

The male gamete or reproductive cell involved in sexual reproduction.