Physics Quest Review (Test 3)

More massive objects accelerate at a greater rate. (ignore air resistance)

• True

• False

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

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

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time
• the horizontally thrown ball
• the dropped ball
• None of these

Two objects - one with mass m and the other with mass 2m - are released from rest at the same height. Which object hits the ground first? (ignore air resistance)

• mass m
• mass 2m
• both objects hit the ground at the same time
• unable to determine with information given

In the absense of air resistance, as an object travels through the air, its horizontal velocity

• changes continuously
• not enough information
• remains the same

What is the horizontal acceleration of a projectile?

• 0 m/s²
• -9.8 m/s²
• 0 m/s
• -9.8 m/s

What is the vertical acceleration of a projectile?

• 0 m/s²
• -9.8 m/s²
• 0 m/s
• -9.8 m/s

What can you say about motion in the x and y direction?

• x is dependent on y
• y is dependent on x
• They are dependent on each other.
• They are independent of each other.