A 250-Kg Projectile Is Launched at an Angle of 20

question 9

Multiple Choice

A 2.50-kg projectile is launched at an angle of 20.0° above the horizontal with an initial speed of 100 m/s from the top of a building 40 m high.If the projectile is traveling 85.0 m/s at its maximum height of 47.0 m,how much work has been done on the projectile by air friction?

• A)-3.3E+3 J
• B)1.7E+2 J
• C)-3.5E+3 J
• D)2.4E+4 J

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Definitions:

Anaerobic Breakdown

The process of generating energy in cells in the absence of oxygen, producing substances such as lactate.

ATP

Adenosine triphosphate is a compound that transports energy within cells to fuel metabolic processes.

Aerobic Respiration

The process of producing cellular energy involving oxygen, converting glucose and oxygen into carbon dioxide and water, and releasing energy.

Nutrients

Substances needed by organisms to survive, grow, and reproduce, which are obtained from food.