Getting ahold of me

Hi, Ladies and Gentlemen:

As you saw when you walked in, I am not there.  You can contact me by text and  I will send out a video invitation if you would like to talk and figure out how we should proceed on these problems.

You have my cell #.  Please, contact me if you are struggling.

Catapult Things

Projectile Problems

SHOW ALL WORK and FORMULAS

variable	x	y(up)	y(down)
d
v(i)
v(f)
a
t

1.  A rock is thrown with an initial vertical velocity component of 30 m/s and an initial horizontal velocity component of 40 m/s.

a. What will the distance to which the rock rises?
b. Assuming the launch and landing heights are the same, how long will the rock be in the air?
c. Assuming the launch and landing heights are the same, how far will the rock land from where it was thrown?

SHOW ALL WORK and FORMULAS

variable	x	y(up)	y(down)
d
v(i)
v(f)
a
t

2. A ball rolls off of a diving board that is 3 meters above the water.  It's horizontal speed is 1 m/s.

a.  Determine the x-distance that the ball will land from the edge of the board.
b.  How long will it take for the ball to hit the water?

SHOW ALL WORK and FORMULAS

variable	x	y(up)	y(down)
d
v(i)
v(f)
a
t

3.  A football kicker aims the ball down the field, and it rises to a height of 10 meters before dropping in a perfect parabola.

a. How long will it remain in the air?
b. If it's x-velocity is 5 m/s, how far will it travel?
c. Challenge Problem:  The minimum height to land over the the goal post is 3 m.   What is the maximum distance, in meters, that the field goal kicker can be away from the post?

SHOW ALL WORK and FORMULAS

variable	x	y(up)	y(down)
d
v(i)
v(f)
a
t

4.  A ball drops from the top of its parabola downward, and hits the ground with a v(f) of 14 m/s.
a.  How high did the ball rise?
b.  What is the total time the ball is in the air?
c.  If the ball traveled 6 m horizontally, what is the speed in the x-direction?
d.  Can you say v(i) up = v(f) down are equal in the y-direction if this is a perfect parabola?  Why or why not?

TURN IN ALL WORK BEFORE YOU LEAVE.  THIS MUST BE DONE INDIVIDUALLY.

Read:

http://www.physicsclassroom.com/Class/vectors/u3l2a.cfm

http://www.physicsclassroom.com/Class/vectors/u3l2b.cfm 

Use the marbles and golf balls found in the bottom cabinet ( to the left of the sink by my desk.)   Set up a ramp using the active physics books...the spine crease makes a great ramp.

Complete the lab found here


===Tyler, Seth, and Cameron, please text me regarding the parking lot project===

Marshmallow Catapults

http://www.devincollier.com/2011/04/16/how-to-build-a-simple-small-marshmallow-catapult/

http://www.hometrainingtools.com/mousetrap-catapult-project/a/1577/



Shoot the Marshmallows.   Collect Data and Observations

Sample Data and Observation Sheet

Create, INDIVIDUALLY, four problems that deal with safety in the parking lot.

Links of help:

Physics for Engineers

Seatbelts

Pole Problems

Physics Problems Set

Crash Reconstruction

SaferCar.gov

• One problem must deal with a person who drops something in the crosswalk and is tragically struck by a car traveling.   Include details on the streets involved, the momentum before, and the momentum after.
• One problem must deal with a vehicle that hits the power pole.
• One problem must deal with an inelastic collision between two vehicles.
• One problem must deal with the impulse experienced by someone in the accident.

Your problems must be different from anyone else.  The four, handwritten problems are due at 10:30.

Safety Project

View Larger Map

Goal:  Take a position about the safety or non-safety of the intersection of Prospect, Sherman, and the faculty parking lot.  Support with evidence, calculations, and models.

I. Model the setting using an acceptable scale.  Model will be graded on accuracy, quality and usability for the presentation.

II. Model sample situations that can happen at the intersection, including:

a.  a situation that will have 2d momentum and a collision
b.  a situation that will force a driver to stop suddenly when an obstacle appears in the pathway
c.  a comparison of the same car driving the same location at different speeds.
d. a problem that deals with net force, mu, or stopping distances under different weather conditions.
e. solve each of the situations in a-d, showing all work

III.  Recommendations for the area of interest, including
a. dimensions
b. anticipated costs
c. rationale

IV. Presentation that explains recommendations and models the most likely sample situations.  This presentation must include the scale model and will be video-taped.  Creation of interest is critical.

Dr. Rickey doc