Physics: Projectile Motion

A vector is a quantity that had

• magnitude and time
• time and direction
• magnitude and direction
• direction and rhythm 

A scalar is a quantity that had

• direction
• magnitude
• time
• color

When representing velocity as a vector...

• the directino of the arrow shows the direction of motion
• the length represents speed
• the length of the arrow is drawn to a suitable scale
• all of these

Which of the following would NOT be considered a projectile? 

• a cannonball thrown straight up
• a cannon ball rolling down a slope
• a cannonball rolling off a table
• a cannonball thrown in the air

Tags

NGSS.MS-PS2-2

The horizontal component of a projectile's velocity is independent of...

• it's range
• time
• the vertical component
• none of these

In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves. 

• True
• False
• Sometimes true
• Sometimes false

Tags

NGSS.HS-PS2-4

In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. 

• True
• False
• Sometimes true
• Sometimes false

A ball is thrown into the air at some angle. At the very top of the ball's path, its velocity is

• entirely vertical
• both vertical and horizontal
• entirely horizontal
• not enough info

In the absence of air resistance, the angle at which a thrown ball will do the farthest is

• 15^o
• 30⁰
• 45^o
• 60⁰

Which best approximates the resultant of a pair of 6-unit vectors at right angles to each other? 

• 0
• 6
• 8
• 12