A Projectile Is Projected from the Origin with a Velocity

question 54

Multiple Choice

A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal. The projectile lands on a roof that is 4.00 m high. What is the time when the projectile hits the roof?

• A) 1.11 s
• B) 1.27 s
• C) 1.33 s
• D) 1.49 s
• E) 1.67 s

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Definitions:

Algorithm

A step-by-step procedure or formula for solving a problem or completing a task, often used in computing and mathematics.

Syllogism

A form of deductive reasoning consisting of a major premise, a minor premise, and a conclusion, used in logic to form arguments.

Reinforcement

A process in operant conditioning that increases the likelihood of a behavior by adding a positive stimulus or removing a negative one.

Conditioning

A process of behavior modification by which a subject comes to associate a desired behavior with a previously unrelated stimulus.