Lesson P1-04-2 Pre-Lecture Quiz

In projectile motion, which of the following best describes the type of motion in the HORIZONTAL direction?

• Constant position
• Constant velocity
• Constant acceleration
• Changing acceleration

In projectile motion, which of the following best describes the type of motion in the VERTICAL direction?

• Constant position
• Constant velocity
• Constant acceleration
• Changing acceleration

When the projectile is at the highest point in its trajectory, which of the following is true?

• The projectile stops for an instant.
• The projectile's speed is at a minimum, but not necessarily zero.
• The projectile's speed is at a maximum.
• The projectile's speed is the same as its launch speed.

Suppose that a projectile is launched so that its initial velocity components are (+30 m/s, +40 m/s). What would the velocity components be two seconds later?

• (+50 m/s, +60 m/s)
• (+30 m/s, +60 m/s)
• (+50 m/s, +40 m/s)
• (+30 m/s, +20 m/s)

Of all six of the projectile motion graphs, which is the only one that is NOT a line?

• Vertical height vs. time
• Horizontal position vs. time
• Horizontal velocity vs. time
• Vertical velocity vs. time
• Horizontal acceleration vs. time