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:

Depreciation Expense

The allocation of the cost of a tangible asset over its useful life, reflecting wear and tear or obsolescence.

Capitalized

Recorded as an asset rather than an expense, allowing the cost to be expensed incrementally through depreciation or amortization.

Implicit Interest Rate

The interest rate in a lease or loan that is not explicitly stated but can be calculated by comparing the present value of the lease payments or loan repayments to the original amount financed.

Present Value Factors

Multipliers used in calculating the present value of a future amount of money or cash flows, considering a specific interest rate over a period of time.