Physics - Motion Continues

OPENING QUESTION:

Please finish yesterday's trig worksheet-- remember, you need to find all sides and all angles.

Let's get the folks designed by the color BLUE (or Green if you have no BLUE person) to ALL head up the white board and share the answers to those problems (you'll need to coordinate with each other as to who lists which)

LEARNING OBJECTIVES:

I will work on the basic concepts of projectile motion during today's class

CALENDAR: My astronomy class is doing observations tonight, join us after sunset (I'll be there too)

WORDS O' THE DAY:

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

FORMULAE OBJECTUS:

    1) vf = vi +at

    2) vavg = (vi + vf)/2 (Kinda Useless)

    3a) xf = xi + vit + 1/2at2

    3b) yf = yi + vit + 1/2at2

    4) vf2 - vi2 = 2a∆x

    4b) vf2 - vi2 = 2a∆y

WORK O' THE DAY:

Make sure you are comfortable with THIS:

Please work with your team to LIST all implied conditions that exist in that situation assuming that the objects' launch elevation and it's crash elevation are the same and we ignore all extraneous factors such as wind and rand and sleet and <blah blah blah>

Person's designated by the color RED (or ORANGE if your team only had 3. If your team only has one or two people, please redistribute yourself to other teams in the class but please, no more than 4 in a group if possible) please then regroup (briefly) the persons designated by the color red from other groups and compare lists.

Make whatever changes are necessary

Return to your home group and share out the revised list!

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Rumor has it that the "perfect" angle to hit a golf ball is at 35o to the horizontal. Take a few moments to discuss that with your team. Let's assume that is correct, why do you suppose that might be?

Please discuss (folks designed by the color RED, please lead the discussion!)

Do a wee bit of research on the interweb to confirm.

Is that true? How did your answer(s) hold up? Please discuss

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Tiger Woods has gotten up there in age, but during his prime, he could (and did!) hit a golf ball in excess of 200 mph off the tee.

So, let's say Tiger Woods smacks a golf ball at 202.4 mph at an angle 35o to the horizontal:

Please address each question in a full sentence response:

  • 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!

  • Sketch that situation showing the initial velocity (magnitude AND direction please) in meters/sec if you please!
  • Now calculate the initial velocity in the Y (vertical) direction (viy)
  • Now please calculate how high the ball will go (hmax)
  • Now please calculate how long it will take to get to hmax
  • What is the vertical component of the golf ball's velocity at hmax?
  • Now please determine how long it will take for the golf ball to fall back to the ground
  • How long was that ball in flight?

 

 

 

 

My solutions are below:

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Here is a rather long-winded explanation

 

As a publicity stunt, Tiger Woods once hit a golf ball off of the only (I think?) 7 star hotel in the world. Do a wee bit of research to determine the height of that building.

Now sketch that situation showing all initial conditions whether implied or explicitly state if he hit with the same stats as in the initial problem (above) but this time on top of that hotel.

Now please work with your team to determine how far away the ball lands if we ignore the usual no-nos.