Projectiles

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

• yes
• no

When finding the maximum altitude for a projectile that goes up and comes back down to the same height, what must be done with the time?

• Nothing. Use time as calculated using -2 V_y / g
• Cut the time in half
• Double the time
• 1/4 the time

Tags

NGSS.HS-PS2-1

What do the x & the y projectile formulas have in common, and can be used interchangeably?

• V_x
• V_y
• y
• t

Tags

NGSS.HS-PS2-1

How is vertical velocity calculated for a projectile fired at an angle?

• V cos Θ
• V sin Θ

What formula do you use to get fall time for a projectile if you only have y?

• -2 V_y / g
• V_yi t + 1/2 g t²
• x / V_x
• V sin Θ

Does vertical velocity change as a projectile rises and falls?

• yes 
• no

Tags

NGSS.HS-PS2-4

Which best describes the horizontal motion of a projectile, assuming no air resistance?

• Acceleration of -10 m/s²

• Acceleration of -5 m/s²

• An increasing acceleration every second

• Constant velocity

Which best describes the vertical motion of a projectile, assuming no air resistance?

• Acceleration of -10 m/s²

• Accelerations of -5 m/s²

• An increasing acceleration every second

• Constant velocity

Tags

NGSS.HS-PS2-1

A marble traveling at 3 m/s rolls off the edge of a 1 m high table. What is its initial vertical speed?

• -10 m/s

• 0 m/s

• -3 m/s

• -15 m/s

A soccer ball is kicked horizontally off a cliff. What information is needed to find the time to fall?

• The height of the cliff

• The initial speed of the ball

• The mass of the ball

• All of these