Projectiles

What is the initial vertical velocity of a projectile at the apex of the trajectory?

• 0 m/s

• 9.8 m/s

• 9.8 m/s²

• -9.8 m/s²

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.MS-PS2-1

NGSS.MS-PS2-4

A player kicks a ball across the field. At the very top, what is the acceleration of the ball?

• It is accelerating to the right

• There is no acceleration at the top

• 9.8 m/s² up

• 9.8 m/s² down

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

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

Tags

NGSS.HS-PS2-4

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

• Acceleration of -9.8 m/s²

• Acceleration of -5 m/s²

• An increasing acceleration every second

• Constant velocity

If the cannonball from the previous question is fired with a horizontal velocity of 140 m/s, how far will it travel horizontally?

• 141.4 m

• 282.8 m

• 176.3 m

• 83.8 m

The final requirement for a degree in geology is Field Camp, an 8 week field experience in which budding geologists must complete rigorous real-world mapping projects. To celebrate the end of field camp, one student threw his rock hammer off of a 78 m cliff with a horizontal velocity of 34 m/s. He was then reminded that he had one more day of field work, so he needed to go get his hammer. How far away from the cliff did he have to walk in order to find his hammer?

Solve for time first t= sqrt(2d/g)

then Horizontal Distance d=vt

• 221.78 m

• 153.23 m

• 135.65 m

• 78.98 m

Tags

NGSS.HS-PS2-1

How comfortable are you solving horizontal projectile problems?

• Very comfortable

• I'm pretty sure I've got it

• I feel okay but not great

• I'm so confused please help (ask for help if this is you!)

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What is the first step in solving a projectile problem?

• Two columns - x and y

• sketch it

• variable lists

• calculate time

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