Two blocks with masses m 1 = 1.50 kg and m 2 = 3.30 kg are connected by a massle

Question

Two blocks with masses m1 = 1.50 kg and m2 = 3.30 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.270.
Two blocks with masses m1 = 1.50 kg and m2 = 3.30 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.270. Assume that the pulley has a negligible mass and is frictionless, and calculate the speed of the blocks after they have moved a distance 54.0 cm.

Explanation / Answer

acceleration

a = ( m2 - m1) g / ( m1 + m2 ) = ( 7.1- 3.3 ) * 9.8 / ( 7.1 + 3.3 ) = 3.58 m/s2

Application of Newton's second law to masses suspended over a pulley: Atwood's machine
http://hyperphysics.phy-astr.gsu.edu/hba...

For hanging masses:
m1 = 3.3kg
m2 = 7.1 kg

the weights are
m1g = 32.34 N
m2g = 69.58 N

The acceleration is
a = 3.58076 m/s

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