The 25-Kg Head of an Ax Exerts a Force of 80

question 34

Multiple Choice

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree. The speed of the ax head when it strikes the tree is

• A) 1.2 m/s.
• B) 3.4 m/s.
• C) 34 m/s.
• D) 107 m/s.

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Definitions:

Present Value

The present value of a future amount of money or series of cash flows, considering a certain rate of return.

Annuity Due

An annuity for which payments are made at the beginning of each period.

Equal Annual Deposits

Routine, consistent amounts of money deposited into an account or investment over a set period.