A Projectile Is Projected from the Origin with a Velocity

question 20

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 velocity vector when the projectile hits the roof?

• A) V_x = 17.3 m/s, V_y = +13.4 m/s
• B) V_x = 14.3 m/s, V_y = −3.23 m/s
• C) V_x = 17.3 m/s, V_y = −13.4 m/s
• D) V_x = 16.8 m/s, V_y = −3.95 m/s
• E) V_x = 17.3 m/s, V_y = −4.65 m/s

---

Definitions:

Null

A value used in databases to represent missing or undefined data.

City field

A specific field in databases or forms designated for entering or displaying a city's name.

Null Values

Special markers in databases designated for fields with unknown or inapplicable information.

Is Null

A condition used in SQL to check for empty fields in a database.