Physics 12

Mr. JeanSeptember 11th, 2012

The plan: • Video clip of the day• Re-arranging Sheets• Textbooks• Sample Projectile motion question• 1D Medium/difficult Freefall question

Re-arranging Sheets• Make sure your name and date is at the

top of your page.

• If you have more than one sheet make sure it is stapled and that both sheets have your name and date on it.

Textbooks: • About a half dozen textbooks to handout.

• At anytime if you would like to double check to see if you have the correct textbook, you will have to see me in room 314 at lunch or the end of the day.

Quantum Futures: • Google Search: Top Documentary Films

• On the website topdocumentaryfilms use the search field to Search Quantum. The video quantum futures will be found on that search result.

Quantum Futures Questions• Due on Thursday September 13th, 2012

• No more than four sentences per question. Be accurate and concise.

Example: • An object is launched with an initial

velocity of 400m/s at a 25 degree angle from the horizontal axis.

– How long (in seconds) was it in the air?– What was the maximum Height? – What was the total range of this projectile?

What do these questions actually mean?

• How long (in seconds) was it in the air?

• What was the maximum Height?

• What was the total range of this projectile?

Example: • How long was the projectile in the air?

Example: • How long was the projectile in the air?

• How long in the air?

Example: • How long (in seconds) was it in the air?

Example: • What was the maximum Height?

Example: • What was the total range of this projectile?

MIT Monkey Demonstration:

In class work: • Try these questions (individually or with a

partner).

• Use your notes and your textbook to help you through these exams.

1-D Free Fall Question: (Medium/Difficult)

• Tom is an expert jumper. His hang time is 0.95 seconds. How high can Tom jump?

Problems:• A ball is dropped from the top of CN tower

which is 440m above ground. The acceleration of gravity is -9.81m/s2. How long does it take for the ball to hit the ground?

• A golf ball is hit straight up with the initial velocity of 50m/s. This action takes place on the moon. The moon’s gravity is -3.4m/s2. How long does it take for the ball to hit the ground if the maximum height is 357.2m?

Suggested questions from textbook:

• P.72-73– 18, 19, 23, 26, 27 & 28

• P. 80– 1, 2 & 3

• P. 89– 4 to 7