AP Vectors and Horizontal Projectiles

AP Vectors and Horizontal Projectiles

by Dave Fogliatti

Multiple Choice

Which statement describes a vector?

• It has magnitude but no direction
• It has direction but no magnitude
• It has both direction and magnitude
• It has constant magnitude but no
   direction

Multiple Choice

A hiker walks 5 kilometers due north and then 7 kilometers due east. What is her total displacement?

• 2 km

• 8.6 km

• 12 km

• 12.6 km

Multiple Choice

If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement?

• 12 km
• 19 km, East
• 31 km
• 43 km, East

Multiple Choice

To find the magnitude of a vector you use which formula

• inverse sine

• graphical analysis

• pythagorean theorem

• slope

Multiple Choice

A car moved 60 km East and 90 km West. What is the displacement?

• 30 km, West

• 60 km. East

• 90 km

• 150 km

Multiple Choice

A motorboat, which has a speed of 5 meters per second in still water, is headed east as it crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat’s resultant velocity with respect to the starting point?

• 3.3 m/s
• 5.0 m/s
• 6.0 m/s
• 8.3 m/s

Multiple Choice

Sally is going for a jog. She walks 20 meters East, 10 meters North, and 30 meters West. What is Sally's displacement?

• 14 meters

• 10 meters

• 200 meters

• 60 meters

Multiple Choice

In practice A of the figure, What is  the magnitude of the  resultant displacement?

• 5 km 
• 8 km
• 11 km
• 15 km

Multiple Choice

In practice B of the figure, which displacement is the horizontal component?

• 30 km, East
• 30 km, West
• 40 km, North
• 40 km, South

Multiple Choice

The _______ of two or more vectors is the sum of the vectors.

• components
• scalar
• resultant
• magnitude

Multiple Choice

What is the net force?
100 N        230 N
<------        --------->

• 30 N to the right
• 230 N to the right
• 130 N to the right
• This is a balanced force

Multiple Choice

An object is launched horizontally from a cliff.  The time it takes to hit the ground is

• more than if it was just dropped
• less than if it was just dropped
• the same amount of time than if it was just dropped
• impossible to determine

Multiple Choice

What force acts in the y direction that causes an object to travel in a parabolic arc?

• Friction
• Gravity
• Tension
• No force acting.

Multiple Choice

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How far did the ball travel horizontally when it hit the ground? 

• 14 m
• 30 m
• 65 m
• 43 m

Multiple Choice

A bullet is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?

• 0.52 s
• 0.27 s
• 0.13 s
• 0.36 s

Multiple Choice

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

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

Multiple Choice

A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. If air resistance could be ignored, how long would it take the stone to strike the water 80 m below the bridge?

• 1 s
• 2 s
• 4 s
• 8 s

Multiple Choice

Horizontal velocity is constant.

• True
• False

Multiple Choice

What is the vertical acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

Multiple Choice

A ball is rolling across a table with a horizontal velocity of 2m/s. It rolls off a table that's 2m tall. How far does the ball land away from the table (Δx)?

• 1.26 m Away
• 4.13 m Away
• 0.98 m Away
• 3.45 m Away