Presentation is loading. Please wait.

Presentation is loading. Please wait.

Energy – the ability to do work W = Fd = m a d Vf 2 = Vi2 + 2aDx Vf 2 - Vi2 = + 2aDx Vf.

Similar presentations


Presentation on theme: "Energy – the ability to do work W = Fd = m a d Vf 2 = Vi2 + 2aDx Vf 2 - Vi2 = + 2aDx Vf."— Presentation transcript:

1 Energy – the ability to do work W = Fd = m a d Vf 2 = Vi2 + 2aDx Vf 2 - Vi2 = + 2aDx Vf 2 - Vi2 = aDx

2 W = Fd = m(Vf 2 - Vi2 ) 2 W = Fd = 1 mDv2 Kinetic Energy – energy of motion KE = Ek = 1 mv2 units: kg (m/s) 2 = kg m 2 /s 2 = kg m/s 2 m = N m = Joule

3 1. Determine the kinetic energy of a 625-kg roller coaster car that is moving with a speed of 18.3 m/s.

4 2. If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy?

5 Work-Energy Theorem Wnet = DEk Fd = KEf – KEi Fd = 1 mv2f - 1 mv2i 2 2

6 Gravitational Potential Energy GPE = Ug = mgh units: kg m/s2 m = Joule

7 Assignment Take out a sheet of paper:
Give me four potential and four kinetic energy examples

8 Elastic Potential Energy PEelastic = Us = ½ kx2 k = spring constant units: N m2 = N m m equilibrium

9

10

11 Mechanical Energy – sum of all kinetic energy and all types of potential energy ME = KE + SPE Law of conservation of Mechanical Energy Energy cannot be created nor destroyed, it can only changed from one form to another MEi = MEf

12 Law of Conservation of Energy PE + KE = PE + KE PE = KE Ug = Ek mgh = 1 mv2 2

13 It will be graded so sign in with your name
Kahoot ! Get ready

14 Kahoot :PE or KE?

15

16

17 Look at Spock

18 Man in air

19 Look at bain!

20

21 Whats the dino doing? PE or KE?

22

23

24 Now give me two potential and kinetic in notebook


Download ppt "Energy – the ability to do work W = Fd = m a d Vf 2 = Vi2 + 2aDx Vf 2 - Vi2 = + 2aDx Vf."

Similar presentations


Ads by Google