A Karate Master Strikes a Board with an Initial Velocity

question 5

Multiple Choice

A karate master strikes a board with an initial velocity of 10.0 m/s,decreasing to 2.0 m/s as his hand passes through the board.If the time of contact with the board is 0.0020 s,and the mass of the coordinated hand and arm is 1.0 kg,what is the force exerted on the board?

• A) 1000 N
• B) 6000 N
• C) 4000 N
• D) 4500 N

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Definitions:

Profit Circumstances

Situations or factors that affect a company's ability to generate earnings above its costs.

Monopolistically Competitive

Describes a market structure where many firms offer products that are similar but not perfect substitutes, resulting in some control over pricing.

Short-Run Equilibrium

is a condition in which market supply and demand balance out at a certain price level, but only temporarily.

Monopolistically Competitive

describes a market structure where many firms sell products that are similar but not identical, allowing for competition.