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:

Interphase

The phase of the cell cycle in which the cell prepares for division by replicating its DNA and increasing in size, consisting of the G1, S, and G2 phases.

Membrane Channel Protein

Proteins that allow the passage of ions and molecules across cell membranes.

Phospholipid Bilayer

A critical component of all cell membranes, consisting of two layers of phospholipids which provide barriers and pathways for substances entering or exiting the cell.

Integral Protein

A type of membrane protein that is permanently attached to the biological membrane, playing critical roles in transport and signal transduction.