Physics Lesson: Pulley Problem w/Friction Part 2 for high school

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[m1llernigga]

thanks!

[PhysicsEH]

@m1llernigga Glad to help.

[TeaBubblez]

shoudlnt Fg be = m*-9.8? why do u continuously use 9.8

[PhysicsEH]

@TeaBubblez The sign on the 9.8 depends on what sign convention you choose. I chose to make the direction of acceleration = (+) so for the 5 kg the 9.8 is down and down is (+) so it's +9.8 For the 6kg the Fg was not even in the direction of the acceleration, had no effect on the acceleration and I was only looking for its magnitude so that I could calculate the Ff so I used +9.8. Many people choose up as positive for problems and so 9.8 is (-) but you can choose either sign convention.

[StackinnBuddah]

real nicee

[PhysicsEH]

@StackinnBuddah Thanks. Glad to help.

[abhikch1992]

how can the 5kg block pull the 6 kg block down????

[MyZeyar]

@PhysicsEH good explanation

[deniseshabbychic]

what if the mass of the object in the surface is 100N and the object hanging is 50N, will it still go down? thanks

[RobertoEmilioRomero]

The Tension should be 30.7364 Newtons, and the Acceleration 0. Since mass on surface is greater than the mass that is suspended. The only way mass of 5kg can accelerate down is if energy in this system is created, which is impossible.

[RobertoEmilioRomero]

Why will the mass of 5kg accelerate down if the mass on the surface is greater.

[Beaztmaster]

thanks alot!

:)

[vb4des]

new you can upload 15 min in youtube

take your time..:)

thanks..