A ball of mass m 1 and a block of mass m 2 are attached by a lightweight cord th

Question

A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a frictionless pulley of negligible mass as in figure (a). The block lies on a frictionless incline of angle ?. Find the magnitude of the acceleration of the two objects and the tension in the cord.

Consider the following specific case of the system described in the example above. Suppose the angle ? is 76.0? and the mass of the ball is 7.80 kg.

A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a frictionless pulley of negligible mass as in figure (a). The block lies on a frictionless incline of angle ?. Find the magnitude of the acceleration of the two objects and the tension in the cord. Consider the following specific case of the system described in the example above. Suppose the angle ? is 76.0? and the mass of the ball is 7.80 kg. (a) Determine the mass of the block if the tension in the cord is equal to the weight of the ball: T =m1g. kg (b) What is the acceleration in this case? m/s2 If the tension is equal to the weight of the ball, what is the net force on the ball and therefore its acceleration, and what is the acceleration of the block? # what is (b)?

Explanation / Answer

b) if the tension = wt of the ball acceleration is zero

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