Pg 696 1. Read figure 11, where is there more speed? 2. Draw the billiard ball in your journal. Then draw a bowling ball next to it as if it was dropped.

Pg 6961. Read figure 11, where is there more speed?

2. Draw the billiard ball in your journal. Then draw a bowling ball next to it as if it was dropped at the same height with the billiard ball.

3. Any two objects dropped at the same height will not depend on weight but on the ___ pull of those objects.

Pg 6961. Read figure 11, where is there more speed?

2. Draw the billiard ball in your journal. Then draw a bowling ball next to it as if it was dropped at the same height with the billiard ball.Pg 696

1. Read figure 11, where is there more speed?

2. Draw the billiard ball in your journal. Then draw a bowling ball next to it as if it was dropped at the same height with the billiard ball.

3. Any two objects dropped at the same height will not depend on weight but on the ___ pull of those objects.

gravitational

Pg 6961. Read figure 11, where is there more speed?

2. Draw the billiard ball in your journal. Then draw a bowling ball next to it as if it was dropped at the same height with the billiard ball.

3. Any two objects dropped at the same height will not depend on weight but on the ___ pull of those objects. gravitational

Do Now- Mass versus Weight1. Gravity is a pull on an object due to its ___ .2. Mass is the amount of ___ in an object. 3. Therefore mass ___ changes.4. Weight is the measure of the ___ pull on the object.5. Therefore if gravity increases, weight also ___ .

gravitational

mass

nevermatter

increases

Copy in your journal. Class Notes1. Formula is Weight (N) = mass (kg) X gravity (9.81 m/s2)2. The unit for weight is ___3. Given the gravitational force on Earth = 9.81 m/s2

4. Acceleration is an ___ in rate or speed of something.5. If an object has a mass of 10kg. What is its weight? Give correct units.

kg * m/s2

98.1 N10 kg X 9.81 m/s2 =

increase

Do Now1. An increase

an gravitational force depends on two factors:

a. An ___ in mass

b. The ___ the distance between two objects.

increase

shorter

2. If these letters represent stars, which pair of stars have the most gravitational attraction to one another:Bigger case letters have more mass than lower case letters.

A….a A….A a….a

Circle this pair

Do Now-1a. Find the reading on the triple beam balance: see picture b. see picture2. If your agenda pad has a mass of 35 grams, what is its weight?3. If you take your agenda pad on the moon, what is its weight and mass?

Do Now-1a. Find the reading on the triple beam balance:

35grams30+5 =

b. Find the reading of the triple beam balance:161.4 grams60+100+1+ 0.4 =

2. If your agenda pad has a mass of 35 grams, what is its weight?

3. If you take your agenda pad on the moon, what is its weight and mass?

weight = mass X gravity = .035 kg X 9.81 m/s2

= 0.34 N

35g = kg 1000g

3. If you take your agenda pad on the moon, what is its weight and mass?

Weight is less than 0.34 N because there is less gravity on the moon.Mass stays the same; 35 grams

Plotting a Line Graph1. Label your X axis as the gravitational acceleration. Do not plot for the Sun.2. Label your Y axis as the weight of journal.3. Plot your graph and give it a title.

4. What can you infer about the mass of the objects and gravity?5. How does weight depend on gravity?

3. Find the reading for the ruler:

1+ 0.5 = 1.5 inches

5. ___ is the measurement for the amount of space that an object or substance occupies.

Volume of a liquidVolume of a solidFormula is length X width X height

Volume

1. Volume is the measurement for the amount of space that an object or substance ___ .2. We measure the volume of a solid by using a ___ .3. Find these two measurements. See next slide.

occupies

metric ruler

length X width X height

3. Find these two measurements. 1.5 cm

3. Find these two measurements. 3.8 cm

Table #1 Unit Equipment used

mass weight

Table #2 Earth 0.17 m/s2 gravity on moon

25.6 m/s2 gravity on Jupiter

Mass of mug 1 kg

Weight of mug

9.8 N

kilogramNewton

0.17 N

1 kg 1 kg

25.6 N

BalanceSpring scale

Reflectionsdate1. Do you think we needed two labs to understand the difference between mass and weight? Why or why not?

Do Now-In summary:1. Write the formula for weight and include units.2. This means as gravity increases, weight also ___.3. ___ never changes because it does not depend on gravity.4. However there is a greater gravitational force with ___ masses.5. There is also ___ gravitational attraction between objects that are closer together.

1. Write the formula for weight and include units. WEIGHT = MASS x GRAVITY

N = kg X m/s2

2. This means when gravity increases, weight also ___ .3. ___ never changes because it does not depend on gravity.

increasesmass

4. However there is a greater gravitational force with ___ masses.5. There is also ___ gravitational attraction between objects that are closer together.

largermore

Massive Confusion wkt

mass

Kg or g

weight

N

Triple beam balance

Spring scale

1. “Oh no, this can’t be right. How my weight can change from 95 kilograms to 90 kilograms.”, Fred shouted.

2. If I go far enough away from the Earth’s surface, I will get to a place where my mass will be almost zero.

3. An object of 200 kg on the surface of the Earth should still measure 200 kg in the orbiting station space station.

N N

weight

true

4. In the space station, I would use a triple beam balance to find the weight of an object.

5. Bridgett placed a tennis ball on the triple beam balance of 250 grams. Naturally, she could expect the same result on the moon.

6. Food is sold in the supermarket by weight- for example, $2.50 for a kilogram of sugar.

mass

true

N

4. In the space station, I would use a triple beam balance to find the weight of an object.

5. Bridgett placed a tennis ball on the triple beam balance of 250 g. Naturally, she could expect the same result on the moon.

6. Food is sold in the supermarket by weight- for example, $2.50 for a kilogram of sugar.

mass

true

N

7. On the surface of the moon, the weight of a 100 g mass is between 0.1 N and 0. 2 N.

8. Due to the gravitational pull of different terrains, my weight in New Jersey is 100 kg while in Los Angeles it was 101 kg.

9. Galileo was right. Two different masses of rocks, dropped from the same height can land on the ground at the same time.

true

N

weights

10. The amount of gravitational pull of the Earth towards the Sun depends on the weight of the planet.

11. In lab, springs and rubber bands were used to find the mass of the metal sinkers.

12. In lab, the unit used to measure weight of objects is Newton.

true

true

weight

13. A triple beam balance is used to find the weight of objects.

14. It doesn’t matter which planet you go to because the mass of an object will never change.

15. My weight on the moon is less than on Earth since there is less gravity on the moon.

mass

true

true

Do Now1. All object on Earth have weight as they experience a force of gravity that is directed downwards towards the center of the Earth.2. If the unit for weight is

Do now-1. You are familiar with the use of newton (N). But what does a newton feel like? Now lift these:a) How much weight is a 250 gram stapler?b) 2.5 kg brick?c) 7 kg chair?

2.5 N25 N

70 N

Force = 500 (P- 50) where P = pressing point of

you finger and unit for Force is Newton

ex: if you press your finger at 100 cm on the metric ruler then the equation is:

Force = 500 (100-50)Force = 10 N

Lab-1. Part A, place a 1 kg block on the 45 cm and press your finger on the 100 cm mark.

LabPart d- place your finger at the 60 cm mark

LabPart fUse the formula given