Unit 1_Galileo

(1)

Physics

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

I. Who was Galileo Galilei?

- _{Born in 1564 -1642 (during the} medieval period)

- _{His dad sent him to school to be} a medical doctor

- _{He was an Italian physicist,} mathematician, astronomer, philosopher, and polymath. - _{Considered the “father of}

(10)

Pendulum

Motion

(11)

(12)

(13)

Pendulum Investigation: Angle of Amplitude

1. State the Question: Does the angle of amplitude affect the period of a pendulum?

2. Test your hypothesis: a. List the controls

b. List the independent and dependent variable

3. Record your table and graph

- Make an A+ data table to record the different angles you used. Go from low to high. - Graph your data

(14)

(15)

Incline Plane Motion

(16)

(17)

Ticket out of the door

(18)

Practice 1

What is the speed of a train that goes 1,000 km in 5 hours?

Answer:

(19)

Practice 2

A skater goes 57 meters in 13 seconds. What is her speed?

Answer:

v ≈ 4.4 m/sec

Use the approximate sign, not the equal sign

(20)

Formula for distance and time

distance (d) = time x speed

(21)

Practice 3

How far did Kate travel if it took 5 hours for her to reach her destination going at a speed of 80 km per hour.

Answer:

(22)

Practice 4

How much time does it take for a squirrel to run 134 meters at a speed of 12 meters per second.

Answer:

t ≈ 11.2 sec

Remember when you round, you must use

(23)

Practice 5

It took Mrs. Gardinor 2 minutes to walk 600 ft. How fast was Mrs. Gardinor walking. (Put your answer in ft/sec).

Answer:

(24)

Practice 6

If Mrs. Gardinor’s walking speed is 5 ft/sec, how far can she walk in 7 minutes? An hour?

Answers:

d= 2,100 ft (in 7 min)

(25)

Practice 7

When Ms. Mazzola sings, people come from all over to hear her beautiful voice. One man drove from Leland going 50 miles/hour. It only took him 15 minutes to get to the opera hall. How far did he travel?

Answer:

(26)

Table 2: Predicting Time

• Was your predicted/calculated time close to your actual time? Why or Why not?

(27)

(28)

(29)

(30)

What is velocity?(17)

 Velocity is the speed of an object in a certain direction

Velocit

y

Velocit

y

(31)

(32)

(33)

(34)

(35)

Ticket out of the door

 Be able to tell me what this value mean.

5 m/s/s

or

(36)

Practice

2. A car is heading NW at 25 mph. At 10 minutes the car begins to head North. Was there a change in velocity?

(37)

(38)

(39)

(40)

(41)

IV. Definition of Acceleration

 Acceleration is defined as the rate at which an

object changes its velocity.

 _{Two Ways an Object Accelerates}

 _{Change the direction}  _{Change the speed}

(42)

C. Acceleration Formula (25)

a – acceleration - Final velocity

- Initial starting velocity

(43)

• _{It took 5 seconds for Jaylen to run at his max speed of 7 m/s}

from 0. What was Jaylen’s rate of acceleration?

Show your Work! 1. Formula

2. Write your pieces

3. Rewrite formula with pieces 4. Solve using a calculator

5. Units

(44)

• _{In 4 seconds a car goes from 67 mph to 50 mph to pass}

another car. What was the car’s rate of acceleration?

Show your Work! 1. Formula

2. Write your pieces

3. Rewrite formula with pieces 4. Solve using a calculator

5. Units

(45)

Acceleration Practice 1

• _{Which of the following is an example of acceleration?}

A. a car slowing down from 50 mph to 40 mph. B. A car turning a corner

(46)

Calculating Acceleration Practice 2

Hannah starts sliding with a velocity of

1m/s. After 3 seconds her velocity is 7 m/s.

(47)

Calculating Acceleration Practice 3

• _{A man walking at 0.5 m/s accelerates to a velocity of}

(48)

Calculating Acceleration Practice 4

• _{A train traveling at 10 m/s slows down to complete stop in}

(49)

(50)

Time (sec)

Distance (m) Trial 1 Trial 2 Trial 3 Average

Time (sec)

Final Speed (m/s)

Fast walking 10

Running 10

Final Velocity (m/s)

Initial Velocity (m/s) Time (sec) Acceleration

(m/s/s)

Fast walking ₀

(51)

(52)

(53)

Practice 1

(54)

Graphing Acceleration

• _{Make an acceleration graph from the following.}

Holton began walking slowly across the street. Suddenly, Taya, texting while driving, swerves around the corner and hits Holton. Holton is thrown 5 yards before hitting the

(55)

Practice (20)

 Write a creative story describing the acceleration graph

(56)

Practice 3 (20)

 Draw a acceleration graph that reflect the following points:

(57)

(58)

Practice 2 (20)

• _{An Olympic swimmer swims at a acceleration of 3 m/ ( or}

3m/s/s).

• _{What does the value 3 m/ mean?}

(59)

Practice 2

(60)

(61)

t = 1 sec v = 3 m/s

d = 3 m

t = 2 sec v = 6 m/s

d = 6 m

t = 3 sec v = 9 m/s

d = 9 m

t = 4 sec v = 12 m/s

(62)

(63)

B. Acceleration Unit (21)

Unit of acceleration:

or

distance/time/time

20 m/s/s