Vectors & Projectiles Review (use calculator & equations)

Which two are vector quantities?

• speed

• velocity

• distance

• displacement

A girl starts from point C and walks 5 meters toward the east, then turns back and walks 12 meters toward the west. What total distance did the girl walk?

• 7 meters

• 12 meters

• 17 meters

• 60 meters

"Free fall” is the condition in which

• the motion of an object is caused by gravity only

• the motion of an object is caused by velocity only

• the motion of an object is caused by gravity and air resistance

• the motion of an object is caused by air resistance only

Which of the following diagrams best represents the vertical displacement of a rock in freefall?

• 
• 
• 

A t-shirt is shot straight up from a t-shirt cannon. What would its acceleration be at the very moment it reaches the top?

• 9.8 m/s²

• 0 m/s²

• 19.6 m/s²

• 4.9 m/s²

A ball is dropped off a bridge and it takes 5 seconds before it hits the water below. About how fast is the ball traveling just before it hits the water?

• 9.8 m/s

• 25 m/s

• 50 m/s

• 15 m/s

Which of the following vectors could be a resultant for the two vectors shown?

• 
• 
• 
• 

A rock launched with an angle of 20^o above the ground travels 240 m. How far will the rock travel if it is launched with an angle of 70^o above the ground?

• 120 m

• 12 m

• 24 m

• 240 m

What happens to a projectile's horizontal velocity as the vertical velocity changes?

• It changes by 9/8 m/s every second

• It depends on the vertical velocity

• It remains constant

• IDK

What is the magnitude of the resultant vector of a dog that ran 5 m/s North and 2 m/s East.

• 29 m/s

• 50 m/s

• 5.4 m/s

• 10.8 m/s