A Ball Rolls Over the Edge of a Platform with Only

question 143

Multiple Choice

A ball rolls over the edge of a platform with only a horizontal velocity. The height of the platform is 1.6 m and the horizontal range of the ball from the base of the platform is 20 m. What is the
Horizontal velocity of the ball just before it touches the ground? Neglect air resistance.

• A) 9.8 m/s
• B) 70 m/s
• C) 20 m/s
• D) 4.9 m/s
• E) 35 m/s

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Definitions:

Hypothesis

A proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Expected Frequency

The predicted count of occurrences or the number of times an outcome is anticipated to happen in a statistical experiment.

Normal Distribution

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Interval

A range of numbers between two specified limits.