Projectile Motion

At what point is v_y= 0 m/s?

• A

• B

• C

• D

• None of these points

Tags

NGSS.MS-PS2-4

Who do you agree with?

• Anita: “A projectile’s v_x changes because of gravity, and its v_y remains constant.”

• Barry: “Both v_x and v_y are constant.”

• Chris: “A projectile has no acceleration in the vertical dimension but it does accelerate horizontally.”

• Dave: “A projectile has vertical acceleration and a constant horizontal velocity”

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

How does the video clip justify that horizontal motion of a projectile is independent of its vertical motion?

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

• less than

• equal to

• greater than

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?

• 14.3 m
• 30.55 m
• 65 m
• 43.55 m

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How long until the ball reaches the ground?

• 0.45 s
• 0.67 s
• 0.22 s
• 0.47 s

Tags

NGSS.HS-PS2-1