A Solid Wood Door, 90

question 7

Multiple Choice

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the same line. What is the angular speed of the door after the collision?

• A) 0.127 rad/s
• B) 0.925 rad/s
• C) 1.14 rad/s
• D) 2.28 rad/s
• E) 4.57 rad/s

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Definitions:

Preventing Outbreak

Measures and practices aimed at stopping the spread of infectious diseases before they can become widespread.

Community Health

The study and improvement of health within a particular geographic area or group of people.

Playground

An outdoor area provided for children to play, typically equipped with recreational structures like slides and swings.

Epidemics

An outbreak of a disease that spreads rapidly and widely among the population in a specific area or community.