Physics: Work. Conservation of energy (4)

Physics: Kinetic energy. Work. Gravitational potential energy. Total mechanical energy. Conservation of mechanical energy. Spring potential energy. Conservation of energy problems

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(1) Kinetic energy. Work
(2) Continued. Gravitational potential energy. Total mechanical energy. Conservation of mechanical energy
(3) A conservation of energy problem
(4) Continued
(5) Another conservation of energy problem
(6) Continued
(7) Spring potential energy. A spring problem
(8) Continued

Category:

Education

Tags:

• physics
• kinetic
• energy
• work
• gravitational
• potential
• total
• mechanical
• conservation
• of
• spring
• problems

[NPulgarin]

If he use h (initial) as "0" the the Final h is "4" ) he is going 4m up, but you can use 7m and 11m..it will give u a proportional answer.

[sunjz]

@sunjz 11-7=4* sry

[sunjz]

@Oboetoke100 11-7=8

[whiteninjaooo]

@Oboetoke100

11m-7m=4m

u need to use 7m not 8m

[whiteninjaooo]

at 4:19 where is the 2/5 coming from?and why?

[Oboetoke100]

hows the height 4? lol

[mohamed140817]

How is the height 4????????

[sugarcanelies]

@bluejimmy168 when you look at the formula both potential energy and kinetic energy have mass. so mgh+0.5mv^2=mgh+0.5mv^2. You would be able to cancel out the mass from the formula since they are all the same, and solve the problem without it.

[bchou222]

the girl seems so enthusiastic!!!

[WongeneKIM]

Thank you for your lectures!