Q7 A 50.0-kg bucket is being lifted by a rope. The rope will not break if the tension is 525 N or less. The bucket started at rest, and after being lifted 3.0 m, it is moving at 3.0 m/s. If the acceleration is constant, is the rope in danger of breaking? [570 N, the rope is in danger of breaking]​

Respuesta :

The tension in the rope is greater than 525 N, thus, the rope is in danger of breaking.

Acceleration of the bucket

The bucket started at rest, and after being lifted 3.0 m, it is moving at 3.0 m/s, the acceleration is calculated as follows;

v² = u² + 2as

v² = 0 + 2as

3² = 2(3)a

9 = 6a

9/6 = a

1.5 m/s² = a

Tension in the rope

T = m(a + g)

T = 50 (1.5 + 9.81)

T = 565.5

T ≈ 570 N

The tension in the rope is greater than 525 N, thus, the rope is in danger of breaking.

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