Physics - Projectile Motion (Continues)

OPENING QUESTION:

We took a bit of a detour into "canyon" problems yesterday and didn't really get into the guts of the lesson plan.

Let's do that now:

Please take a look at the following graph-

There is an AWFUL LOT going on there, so please take a few moments to analyze that graphic with your team and be prepared to share interesting tidbits that you find there.

LEARNING OBJECTIVES:

  1. I will be able to analyze the horizontal parts of an object experiencing projectile motion during today's class
  2. I will be able to analyze the vertical parts of an object experiencing projectile motion during today's class

CALENDAR:

Lab Returns *today* - By and large very nicely done (although a few of us forgot to include the graphs (ack!)

WORDS O' THE DAY:

  • Projectile Motion - Up/Vertical (y motion) AND Out/Horizontal (x motion)

FORMULAE OBJECTUS:

    1a) vfx = vix +axt

    1a) vfy = viy +agt

    2a) xf = xi + vit + 1/2at2

    2b) yf = yi + vit + 1/2agt2

    3a) vfx2 - vix2 = 2a∆x

    3b) vfy2 - viy2 = 2ag∆y

WORK O' THE DAY:

Returning to the image in our opening question:

What percentage of that object's motion is horizontal at hmax?

What percentage of that object's motion is vertical at hmax?

Compare the motion of the object at Points A & E.

Yeah... but what does it MEAN?

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Let's mush on!

Rumor has it that the "perfect" angle to hit a golf ball is at 35o to the horizontal.

Let's imagine that Tiger Woods (who is perhaps the GOAT <Greatest Of All Time> golfers) has smacked a golf ball at 202.4 mph at an angle 35o to the horizontal as shown below:

Please discuss the following with your team:

  • What do we mean by "to the horizontal?"
  • Does the golf ball move faster or slower after it has left Tiger's golf club?

Now let's HIT the work!

What if I was being a wee bit *feisty* and I asked you to tell me (and of course that means show all of your work using full wolgemuthians) how far away the golf ball lands?

  • Sketch that situation showing all initial conditions (hint: keep in mind you'll be showing displacement (how far) information AND velocity (how fast) data in two different dimensions.
  • Analyze the motion of the ball and work with your team to come up with a solution for solving the problem BEFORE you get started!

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My solution is below:

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WHEW! That's a fair bit of work!

How would the problem be different if the tee (the area where he hit the ball) was 47 meters above where the ball eventually landed?

Please sketch and analyze that situation with your team

 

 

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