As shown in the figure, blocks of masses m1 = 250 g and m2 = 500 g are attached
ID: 2255284 • Letter: A
Question
As shown in the figure, blocks of masses m1 = 250 g and m2 = 500 g are attached by a massless string over a frictionless and massless pulley. The coeffecients of static and kinetic friction between the block and inclined plane are 0.25 and 0.123 respectively. The angle of the incline is 30 deg, and the blocks are at rest initially.
a) In which direction do the blocks move? b) What is the acceleration of the blocks?
As shown in the figure, blocks of masses m1 = 250 g and m2 = 500 g are attached by a massless string over a frictionless and massless pulley. The coeffecients of static and kinetic friction between the block and inclined plane are 0.25 and 0.123 respectively. The angle of the incline is 30 deg, and the blocks are at rest initially. In which direction do the blocks move? b) What is the acceleration of the blocks?Explanation / Answer
1) since mass of m2>m1 so m2 is moving downwards and m1 upwards
2.)m2*g-T=m2*a
and
T-m1*g*sintheta-0.123*m1*gcostheta=m1*a
soving for T and a
T=2.275 N
a=5.26 m/s^2 ans
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