CW: Tips for Solving Projectile Problems

What is the primary focus of this video?

• How to calculate acceleration

• How to solve projectile motion problems

• The definition of velocity

• The effects of air resistance

What is the recommended first step when approaching a projectile motion problem?

• List all known and unknown variables

• Draw out the problem

• Choose the correct kinematic equation

• Calculate the acceleration

What is unique about the time variable when analyzing projectile motion in both X and Y directions?

• It is always zero

• It is different for the X and Y directions

• It is the only variable that is the same for both X and Y directions

• It is only relevant for the Y direction

What is the acceleration in the X-direction for a projectile motion problem, assuming no air resistance?

• -9.8 m/s²

• Varies depending on initial velocity

• Always 0

• Equal to the acceleration in the Y-direction

Which kinematic equation is most suitable for finding the initial vertical velocity (Voy) of a projectile when its vertical displacement, vertical acceleration, and total time in the air are known?

• Δv = aΔt

• Δy = Voy*t + 0.5*ay*t^2

• Vyf^2 = Voy^2 + 2*ay*Δy

• Vyf = Voy + ay*t

What is the initial vertical velocity of the cannonball?

• 5.71 m/s

• 32.87 m/s

• -9.8 m/s^2

• 33.27 m/s

What is the initial horizontal velocity of the cannonball?

• 32.87 m/s

• 5.71 m/s

• 40 m

• 7 s

What is the initial speed of the cannonball when it is shot out of the cannon?

• 32.87 m/s

• 5.71 m/s

• 33.27 m/s

• 40 m/s