How did the cars work?

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

We remember that energy is… The ability to do work! This Photo by Unknown Author is licensed under CC BY-SA 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

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

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

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

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

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

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) = 136.4 J The sugar glider will have the potential energy of 136.4 J Notes B Notes C Practice Qs Activity End

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

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 This Photo by Unknown Author is licensed under CC BY

The sugar glider has a kinetic energy of 150 J 2 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 This Photo by Unknown Author is licensed under CC BY

Homework – Learning Menu If you want to be able to do the activities on Monday these need to be done! Practice Qs Activity End

Find the energy of your cars! Activity End This Photo by Unknown Author is licensed under CC BY-NC-SA

REMINDER. INQUIRY WORK BLOCK TOMMORROW REMINDER! INQUIRY WORK BLOCK TOMMORROW! 17 days until the project is due! Come prepared to work & ask questions. End