A book with a mass of 2.5 kg falls from a high shelf in a library. At a height of 2.0 meters its velocity is 2 m/s. What is the mechanical energy of the book?

Answers are:

5J

44J

49J

54J

A centrifuge in a medical laboratory rotates at an angular speed of 3,400 rev/min. When switched off, it rotates through 48.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.

You walk 33 m to the north, then tirn 60 degrees to your right and walk another 45 m. How far are you from where you originally started?

What is the Principle of electric generator?

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List three different emotions?

The jet stream flows from east to west across the United States. True False

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You and your housemate have an argument over the cost of the electric bill. You want to turn off the outside porch light before going to bed each night.