Mark Throws a Ball to Daniel with an Initial Speed

question 21

Multiple Choice

Mark throws a ball to Daniel with an initial speed of 20 m/s at an angle of 45 degrees.If they are initially 55 m apart,calculate the average speed Daniel has to run to catch the ball.(Assume the ball is thrown and caught at the same height.Also assume that Daniel starts to run when the ball is thrown.)

• A)19 m/s
• B)14 m/s
• C)4.9 m/s
• D)9.1 m/s
• E)2.9 m/s

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Definitions:

Hypothesis

A suggested hypothesis developed from minimal evidence to initiate more detailed exploration.

Power

The probability that a test correctly rejects a false null hypothesis, also referred to as the sensitivity of the test.

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A numerical computation comparing a person's weight and height, serving as an indicator of healthy body weight but not directly measuring body fat.