Question

Consider the system shown, Block A weighs 45N and block b weighs 25N. Once block b is set into downward motion, it descends at a constant speed.

Its an atwood machine with A resting on a surface and B dangling off the surface.

____A____
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B

uk equals 0.556 i got that

If the weight of block B is doubled, find the acceleration .

Use this equation the sum of the forces in the system= Mass of system* Acceleration of system to find acceleration.

Whats the driving and resistance force and whyd you choose that?

Answer 1

the pulling force Mb*acceleratin minus the friction force = (total mass)a
or
B/g*a - A/g*9.8*.556=(Ma+Ma)*a
so this converts the given weights of the masses to masses as
B/g = MassB and A/g= MassA
so solve for acceleration a.