A Projectile Is Launched from the Edge of a Cliff

question 45

Multiple Choice

A projectile is launched from the edge of a cliff with a velocity of 10.0 m/s at an angle of 30.0 degrees above the horizontal. What is the velocity of the projectile 2.00 seconds later (ignoring air resistance, and assuming it hasn't reached the ground yet) ?

• A) V_x = 8.7 m/s, V_y = −14.6 m/s
• B) V_x = 14.6 m/s, V_y = −5.6 m/s
• C) V_x = −8.7 m/s, V_y = −14.6 m/s
• D) V_x = −14.6 m/s, V_y = 8.7 m/s
• E) V_x = 5.6 m/s, V_y = −14.6 m/s

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Definitions:

Data Redundancy

The unnecessary repetition of data within a database, which can lead to inconsistencies and increased storage.

Foreign Key

A field in a database table that is a primary key in another table, used to create a link between the two tables.

Primary Key Field

A special field in a database table used to uniquely identify each record within the table.

Primary Key Field

A unique identifier for each record in a database table, used to ensure data integrity.