1. How did the cars work?

2. Remember to look for the fish!
Intro
Notes A
Notes B
Notes C
Practice Qs
Activity
End

3. We remember that energy is…
The ability to do work!
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To cause something to move or change direction.
To move something against a force.
Intro
Notes A
Notes B
Notes C
Practice Qs
Activity
End

4. Car Incline
Car Powered
So we saw energy at work in the 2 cars we made. Was it the same energy?
Intro
Notes A
Notes B
Notes C
Practice Qs
Activity
End

5. Potential Energy (PE) Car Incline
The energy stored by an object as a result of its position.
Notes A
Notes B
Notes C
Practice Qs
Activity
End

6. Kinetic Energy (KE) Car Powered
The energy that matter has because of motion and mass.
Notes A
Notes B
Notes C
Practice Qs
Activity
End

7. Calculating PE PE = mgh PE – Energy in Joules (J)
m – mass in kilograms (kg)
g – gravitational acceleration of the earth
9.8 m / s2
h – height above earth’s surface in metres (m)
Notes B
Notes C
Practice Qs
Activity
End

8. If a 0.12 kg sugar glider is getting ready to jump from the world’s tallest tree at 116 m how much potential energy does it have?
Notes B
Notes C
Practice Qs
Activity
End

9. The sugar glider will have the potential energy of 136.4 J
PE = mgh
PE = ?
m =
0.12 kg
g =
9.8 m/s2
If a 0.12 kg sugar glider is getting ready to jump from the world’s tallest tree at 116 m how much potential energy does it have?
h =
116 m
PE = mgh
PE = (0.12 kg)(9.8 m/s2)(116 m)
= (0.12 kg)x(9.8 m/s2)x(116 m)
= J
The sugar glider will have the potential energy of J
Notes B
Notes C
Practice Qs
Activity
End

10. Calculating KE 1 KE = x m x v2 KE – Energy in Joules (J) 2
m – mass of object (kg)
v – speed of object
Don’t forget your order of operations! BEDMAS or PEMDAS ! Exponents before multiplication! 2
Notes C
Practice Qs
Activity
End

11. If the 0.12 kg sugar glider has jumped and is travelling at 50 m/s what is it’s kinetic energy?
Notes C
Practice Qs
Activity
End
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12. The sugar glider has a kinetic energy of 150 J2
KE = x m x v2
KE = ?
m =
0.12 kg
v =
50 m/s
If the 0.12 kg sugar glider has jumped and is travelling at 50 m/s what is it’s kinetic energy? 1 2
KE = x m x v2
KE = x (0.12kg) x (50 m/s)2
= x (0.12kg) x (2500)
= 150 J 1 2
BEDMAS! 1 2
The sugar glider has a kinetic energy of 150 J
Notes C
Activity
Practice Qs
End
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13. Homework – Learning Menu
If you want to be able to do the activities on Monday these need to be done!
Practice Qs
Activity
End

14. Find the energy of your cars!
Activity
End
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15. REMINDER. INQUIRY WORK BLOCK TOMMORROW
REMINDER! INQUIRY WORK BLOCK TOMMORROW! 17 days until the project is due! Come prepared to work & ask questions.
End