A Turntable Has a Radius of 0

question 5

Multiple Choice

A turntable has a radius of 0.80 m and a moment of inertia of 2.0 kg • m².The turntable is rotating with an angular velocity of 1.5 rad/s about a vertical axis though its center on frictionless bearings.A very small 0.40-kg ball is projected horizontally toward the turntable axis with a velocity of 3.0 m/s.The ball is caught by a very small and very light cup-shaped mechanism on the rim of the turntable (see figure) .The percent of the initial kinetic energy of the system that is lost during the capture of the ball is closest to

• A) 45%.
• B) 51%.
• C) 55%.
• D) 60%.
• E) 65%.

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Definitions:

Lerner Index

A measure of a firm's market power and pricing strategy, defined as the difference between price and marginal cost, scaled by price.

Elastic

Describes a situation where the quantity demanded or supplied of a good or service changes significantly in response to price changes.

Inelastic Demand

Describes a situation where the demand for a product does not change significantly in response to a change in the product's price.

Barriers to Entry

Obstacles that make it difficult for new competitors to enter a market, such as high startup costs, strict regulations, or strong brand loyalty.