Free Fall / Horizontally launched projectiles

1. What two things are required of a vector quantity?

• magnitude and time.

• time and direction.

• magnitude and direction.

During the path of a projectile, when is d_y (the vertical displacement / height) the highest?

• at the top of its path.

• at the end of the path.

• in between the top and the end of the path.

Tags

NGSS.HS-PS3-2

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 both hit the ground at the same time.

• The dropped ball

• The horizontally thrown ball

In the absence of air resistance, the angle at which a thrown ball will go the farthest is....? (think back to the golf range lab)

• 15 degrees

• 30 degrees.

• 45 degrees.

• 60 degrees.

At what part of a path does a projectile have minimum speed?

• Halfway to the top

• At the top of its path

• When it is thrown

A projectile launched horizontally hits the ground in 0.8 seconds. If it had been launched with a much higher speed, in the same direction, and from the same height, it would have hit the ground in...? (think back to the horizontal projectile investigation)

• more than 0.8 s.

• 0.8 s.

• less than 0.8 s.

A projectile is fired horizontally with no air resistance. The projectile maintains its constant horizontal velocity because it

• ate all of its vegetables.

• it went to Central

• it starts with no vertical velocity.

• No forces are acting on it in the horizontal direction.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What variable letter is horizontal velocity?

• X
• Y
• V_x
• V_y

Does the horizontal velocity have any effect on the vertical velocity?

• yes

• no

Which of the following would NOT be considered a projectile? 

• a cannonball thrown straight up
• a cannon ball rolling down a slope
• a cannonball rolling off a table
• a cannonball thrown in the air

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2