Ch. 13Lesson 1

How can you describe motion?

variable

motion

moves in many directions & speeds

periodic motion

moves back & forth

ex: pendulumcircular

motion

ex: wheel

vibrational motion

ex: plucking rubber band

types of motion

vibrational motion

plucking rubber band

speed• how far object moves during certain amount of time

average speed = distance time

• The fastest land animal, the cheetah, can run 70 miles in 1 hour. – speed= 70= 70 mph 1

No Speed Limit: Introducing the Cheetah [01:09]

Calculate the speed.

• A sloth climbing 10 feet in 2 minutes

• 10 = 5 ft/min5 ft/min 2

motion•measured in relationship to point of reference

The passenger can use a tree as a reference point to decide if the

train is moving.

A tree makes a good reference point because it

is stationary from the passenger’s point of view.

velocity•speed & direction of an object’s motion

Activity-Speeding StudentsName Distance Time Speed= d

t

Mrs. Holewinski

20 m 5 sec 20 = 4 m

5 sec

Taylor (ran) 20 m 5 sec 20 = 4 m

5 sec

Zachary 20 m 4 sec 20 = 5 m

4 sec

Ryan (crab) 20 m 20 sec 20 = 1 m

20 sec

Anthony A

(cartwheeled)

20 m 17 sec 20 = 1.2 m

17 sec

Balloon Powered Race CarsMaterials:

• standard 9 inch balloon• pen barrel or straw • various materials to construct the racers

Rules:• The car must be powered by no more than 2 balloons. The balloons may only be blown up

using lung power by the car operator. No other gases, such as helium, may be used. • You can build the car out of anything, except a toy car or toy car parts. • It must have at least three wheels. Wheels are defined as anything that is round and goes

around. • The wheels can not be wheels from a toy car. They must be made out of something that was

not originally meant to be used as wheels. • The car may not leave the ground. • The car must be capable of traveling at least 5 meters. • Your car, with the completed entry form, is due on Tuessday, June 2.

Procedure:• You will use materials from home and assemble your car at home.   • On race day we will set up a track in our classroom.  • You will race in pairs against other classmates.  • Cars that follow all of the rules will be eligible for awards.   • These awards will be given in three categories. 1. Best Looking Car

2. Fastest Car (in first 5 meters) 3. Farthest Distance Traveled

Good Luck!

Driver Name Car Name Materials

Distance Traveled

(cm)Running Time

(seconds)

Jane DoePussycat Express

3 straws, balloon,

electrical tape, 4 Styrofoam lids 15.33 5.86

GRADING RUBRIC POINTS

FOLLOWED RULES ___ OUT OF 80

CAR TRAVELED AT LEAST 5 METERS

___ OUT OF 5

ENTRY FORM COMPLETED CORRECTLY

___ OUT OF 5

EFFORT ___ OUT OF 10

WON AWARD +5

TOTAL SCORE

GRADING RUBRIC POINTS

FOLLOWED RULES ___ OUT OF 80

CAR TRAVELED AT LEAST 5 METERS

___ OUT OF 5

ENTRY FORM COMPLETED CORRECTLY

___ OUT OF 5

EFFORT ___ OUT OF 10

WON AWARD +5

TOTAL SCORE

GRADING RUBRIC POINTS

FOLLOWED RULES ___ OUT OF 80

CAR TRAVELED AT LEAST 5 METERS

___ OUT OF 5

ENTRY FORM COMPLETED CORRECTLY

___ OUT OF 5

EFFORT ___ OUT OF 10

WON AWARD +5

TOTAL SCORE

GRADING RUBRIC POINTS

FOLLOWED RULES ___ OUT OF 80

CAR TRAVELED AT LEAST 5 METERS

___ OUT OF 5

ENTRY FORM COMPLETED CORRECTLY

___ OUT OF 5

EFFORT ___ OUT OF 10

WON AWARD +5

TOTAL SCORE

Driver Name Car Name MaterialsDistance Traveled

(cm)Running Time

(seconds)

Driver Name Car Name MaterialsDistance Traveled

(cm)Running Time

(seconds)

BEST LOOKING BALLOON POWERED RACE CAR

BALLOON POWERED RACE CAR

THAT TRAVELED THE

FARTHEST DISTANCE

FASTEST BALLOON POWERED RACE CAR

Activity-How can you learn about the motion of a pendulum?