Energy—Day 6 Materials Needed: Writing Utensil Folder Notebook Please pick up the handout on the front table!

B ELL W ORK & A GENDA D AY 6 1. A 20 kg hammer is lifted 10 m. Calculate the gravitational potential energy of the hammer. 2. A 70 kg man is walking at a speed of 2 m/s. What is his kinetic energy? Agenda BLAM Greek/Latin quiz Compare & contrast forms of energy

Q1: H OW DO MOST WAVES TRANSFER ENERGY ? A. through ocean waves B. by a combination of waves C. waves do not transfer energy D. by the vibration of particles in a medium SC8.2.3.a DOK 1

Q2: W HY IS IT POSSIBLE FOR A WAVE TO MAKE A LEAF BOB UP AND DOWN ON THE WATER, BUT IT CANNOT MOVE THE LEAF TOWARDS THE SHORE ? A. Waves only transfer crests. B. Waves only transfer matter. C. Waves only transfer energy. D. Waves only transfer troughs. SC8.2.3.a DOK 2

MATH BOOSTER D AY 6 A student worked for 6 hours at $5 an hour. Later, the student went shopping and bought two magazines at $4.50 each, a pen at $7.25, and fast food at $7.35. How much money, if any, does the student have left?

G REEK & L ATIN D AY 6 Greek /LatinMeaning metermeasuring axiaxis goniangle leglaw operwork

O BJECTIVE D AY 6 I will know (knowledge): the similarity and difference between kinetic and potential energy. I will be able to (skill): compare and contrast among kinetic energy, potential energy, and mechanical energy.

B ELL W ORK D AY 6 – ANSWER #1 1. A 20 kg hammer is lifted 10 m. Calculate the gravitational potential energy of the hammer. Givens: 20 kg =m 10 m = h Know: g = 9.8 m/s 2 Unknown: PE Equation: PE = mgh Plug in numbers: (20 kg)(9.8 m/s 2 )(10 m) Answer: = 1960 J

B ELL W ORK D AY 6 – ANSWER #2 2. A 70 kg man is walking at a speed of 2 m/s. What is his kinetic energy? Givens: 70 kg =m 2 m/s = v Unknown: KE Equation: KE = ½ mv 2 Plug in numbers: ½ (70 kg)(2 m/s) 2 Answer: = 140 J

A1: H OW DO MOST WAVES TRANSFER ENERGY ? A. through ocean waves Ocean waves are a type of wave. B. by a combination of waves Waves can be combined, but this does not explain how they transfer energy. C. waves do not transfer energy Waves do transfer energy. D. by the vibration of particles in a medium When a particle vibrates, it passes its energy to a particle next to it. The second particle will vibrate like the first and in this way energy is transferred through the medium. SC8.2.3.a DOK 1

A2: W HY IS IT POSSIBLE FOR A WAVE TO MAKE A LEAF BOB UP AND DOWN ON THE WATER, BUT IT CANNOT MOVE THE LEAF TOWARDS THE SHORE ? A. Waves only transfer crests. Crests are the part of the wave at which the displacement of the water from its normal level is highest. B. Waves only transfer matter. Waves only transfer energy, they do not move matter as they travel. C. Waves only transfer energy. Waves only transfer energy, they do not move matter as they travel. The leaf is pushed up by the crest of the wave, but is not moved by the wave. D. Waves only transfer troughs. Troughs are the part of the wave at which the displacement of the water from its normal level is lowest. SC8.2.3.a DOK 2

MATH BOOSTER D AY 6 A student worked for 6 hours at $5 an hour. Later, the student went shopping and bought two magazines at $4.50 each, a pen at $7.25, and fast food at $7.35. How much money, if any, does the student have left? Total amount earned = 6 × $5 = $30 Cost of magazines = 2 × $4.50 = $9.00 Cost of pen = $7.25 Fast food= $7.35 Total expenditure = $ $ $7.35 = $23.60 Money left = $30 – $23.60 = $6.40

SMALL GROUP -- E NERGY F OLDABLE

T URN TO A PARTNER -- D AY 6 PEKE Use the VENN diagram to compare and contrast PE & KE.

T URN TO A PARTNER -- D AY 6 -- ANSWER PE KE energy of motion energy of position unit is a Joule PE & KE are both energy! PE & KE

1.Kinetic and Potential Energy both have the same unit, which is a joule. 2.Potential energy is the energy due to position. 3.Kinetic energy is the energy due to motion. 4.Mechanical energy is KE & PE added together.

Students will complete the concept map provided by the teacher.

EXIT QUESTION – DAY 6 Describe three ways that you used energy resources today.