Two Dimensional Motion

Neglecting air resistance, what it the horizontal velocity (V_X) at A?

• 5 m/s

• 0 m/s

• -10 m/s

• -30 m/s

Tags

NGSS.HS-PS2-1

What is the horizontal acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

Tags

NGSS.HS-PS2-1

What is the vertical acceleration of a projectile?

• 0 m/s²

• -9.8 m/s²

Tags

NGSS.HS-PS2-1

A projectile is launched from a height with an initial horizontal velocity of 20 m/s. If the projectile flies for 40 seconds, what is its horizontal velocity just before it hits the ground?

• 20 m/s

• 2 m/s

• 800 m/s

• 2 m/s

A train is moving at a velocity of 15 m/s East. A passenger at the back of a train throws a baseball with a speed of 15 m/s West. What is the velocity of the baseball relative to the ground? (In other words: how fast does a person on the ground see the ball move?)

• 30 m/s East

• 15 m/s West

• 0 m/s

• 30 m/s West

Tags

NGSS.HS-PS2-2

Vector quantities need both a magnitude and a _____.

• distance

• displacement

• direction

• velocity

What is the path of a projectile?

• Wavy line

• Parabola

• Hyperbola

• Projectiles don't follow a predictable path.

What is true about the horizontal motion of a projectile?

• It accelerates backwards at 9.81 m/s²

• It accelerates forwards at 9.81 m/s²

• It moves at a constant horizontal velocity.

• It cannot be determined.

Which hits the ground first? A ball launched horizontally? or a ball dropped from the exact same height at the exact same time?

• horizontally launched

• the dropped ball

• hit at the same time

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If I throw a crayon straight up at 12m/s, how fast is its speed when i catch it at the same height?

• 6 m/s

• 12 m/s

• 18 m/s

• 24 m/s

Tags

NGSS.HS-PS2-1