Projectile Motion

Why does the horizontal component of velocity for a projectile remain constant while the vertical component changes?

• No horizontal forces

• Gravity acts in the horizontal direction

• No vertical forces

• Horizontal velocity is always 0

Answer explanation

No acceleration means the velocity does not change. A constant acceleration means the velocity is changing by the same amount each second.

How does the downward component of the motion of a projectile compare with the motion of free fall?

• Velocity is always - 9.8 m/s

• Velocity is constant in free fall

Tags

NGSS.HS-PS2-1

Ball A is thrown horizontally with an initial velocity and Ball B is dropped from rest. They both start at the same height and are dropped at the same time. If we ignore air resistance, which ball hits the ground first?

• They hit at the same time

• Ball A

• Ball B

• It depends on the mass

At which point does the soccer ball have a vertical velocity of 0m/s?

• B

• D

• C

• None of the above

Tags

NGSS.HS-PS2-1

A soccer ball is kicked on a flat ground. lf the initial velocity is 36 m/s at point A, what is the landing velocity at point E? (Ignore air resistance)

• 50 m/s  

• -9.8 m/s

• 36 m/s

• 0 m/s

Tags

NGSS.HS-PS2-1

The soccer ball has an initial horizontal velocity of 34 m/s at point A. What is the horizontal velocity at point B?

• 24 m/s  

• -9.8 m/s

• 34 m/s

• 0 m/s

A golfer wants to hit his golf ball further. At what angle should he launch the golf ball at for it to reach the maximum range (x-displacement)?

Trey is launching a water balloon with a slingshot. At what angle should he launch it so that it reaches its maximum height?

• 0 degrees

• 45 degrees

• 15 degrees

• 90 degrees

Which image below accurately represents the vertical and horizontal velocity vectors on a ball thrown into the air at an angle?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

What is the vertical acceleration of a projectile?

• 0 m/s^2

• -9.8 m/s^2

• 2 m/s^2

• 0.5 m/s^2

Tags

NGSS.HS-PS2-1