projectiles

An object is launched horizontally from a cliff.  The time it takes to hit the ground is

• more than if it was just dropped
• less than if it was just dropped
• the same amount of time than if it was just dropped
• impossible to determine

If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first?

• Shot Bullet
• Dropped Bullet
• Hit at Same Time

What force acts in the y direction that causes an object to travel in a parabolic arc?

• Friction
• Gravity
• Tension
• No force acting.

Tags

NGSS.HS-PS2-4

Horizontal velocity is constant.

• True
• False

Tags

NGSS.HS-PS2-2

The vertical component of a projectile's velocity is indpendent of....

• its maximum height
• the horizontal component of its velocity
• time
• none of these

A vector has both ____ and _____

• speed and length
• magnitude and direction
• degrees and radians
• style and grace

When a projectile is at the highest point of its path, the vertical velocity is:

• Constant
• Always -9.8 m/s²
• Zero

A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. If air resistance could be ignored, how long would it take the stone to strike the water 80 m below the bridge?

• 1 s
• 2 s
• 4 s
• 8 s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If you throw a baseball straight up, what is its  vertical acceleration at the highest point?

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

Tags

NGSS.HS-PS2-1

A bullet is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?

• 0.52 s
• 0.27 s
• 0.13 s
• 0.36 s

Tags

NGSS.HS-PS2-4