Projectile Motion

A small cart is rolling at constant velocity on a flat track. It fires a ball straight up into the air as it moves. After it is fired, what happens to the ball?

• it depends on how fast the cart is moving

• it falls behind the cart

• it falls in front of the cart

• it falls right back into the cart

• it remains at rest

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

The same small cart is now rolling down an inclined track and accelerating. It fires a ball straight out of the cannon as it moves. After it is fired, what happens to the ball?

• it depends upon how much the track is tilted

• it falls behind the cart

• it falls in front of the cart

• it falls right back into the cart

• it remains at rest

Tags

NGSS.HS-PS2-2

From the same height (and at the same time), one ball is dropped and another ball is fired horizontally. Which one will hit the ground first?

• the “dropped” ball

• the “fired” ball

• they both hit at the same time

• it depends on how hard the ball was fired

• it depends on the initial height

Tags

NGSS.HS-PS2-1

A projectile is launched from the ground at an angle of 30o. At what point in its trajectory does this projectile have the least speed?

• just after it is launched

• at the highest point in its flight

• just before it hits the ground

• halfway between the ground and the highest point

• speed is always constant

Tags

NGSS.HS-PS3-2

You are trying to hit a friend with a water balloon. He is sitting in the window of his dorm room directly across the street. You aim straight at him and shoot. Just when you shoot, he falls out of the window! Does the water balloon hit him?

• yes, it hits

• maybe – it depends on the speed of the shot

• no, it misses

• the shot is impossible

• not really sure

Tags

NGSS.HS-PS2-1

The more mass an object has, the faster it will fall.

• True
• False

Tags

NGSS.MS-PS2-4

The horizontal component of a projectile's velocity is independent of...

• it's range
• time
• the vertical component
• none of these

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

Tags

NGSS.HS-PS2-4

A projectile is launched from a height with an initial velocity v_0,x. The v_f,x represents the final horizontal velocity before impact.

• v0x = vfx
• v0x < vfx
• v0x > vfx
• unable to determine

Which launch angle will result in the longest range?

• 30°
• 45°
• 60°
• 90°