A Horizontal Disk with a Radius of 10 Cm Rotates

question 56

Multiple Choice

A horizontal disk with a radius of 10 cm rotates about a vertical axis through its center. The disk starts from rest at t = 0 and has a constant angular acceleration of 2.1 rad/s². At what value of t will the radial and tangential components of the linear acceleration of a point on the rim of the disk be equal in magnitude?

• A) 0.55 s
• B) 0.63 s
• C) 0.69 s
• D) 0.59 s
• E) 0.47 s

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Definitions:

Genes

Units of heredity made up of DNA that carry information for the development, functioning, and reproduction of organisms.

Heritability

The proportion of variation among individuals that we can attribute to genes.

Genetic Similarity

The degree to which the genetic makeup of individuals or species resembles each other.

Heritability

The proportion of variation among individuals that we can attribute to genes. The heritability of a trait may vary, depending on the population and environment studied.