Physics: Ch 5 Projectile Motion

A vector is a quantity that has

• magnitude and time

• time and direction

• magnitude and direction

• direction and rhythm 

A scalar is a quantity that has

• direction

• magnitude

• time

• color

When representing velocity as a vector...

• the direction 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 cannonball 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...

• its range

• time

• the vertical component

• none of these

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

• True

• False

• Sometimes true

• Sometimes false

A ball is thrown into the air at a certain 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 travel the farthest is

• 15^o

• 30^o

• 45^o

• 60^o

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

• 0
• 6
• 8
• 12