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block a below weighs 1.90 n, and block b weighs 4.20 n. the coefficient of kinetic friction between all surfaces is 0.30. find the magnitude of the horizontal force necessary to drag block b to the left at constant speed if a and b are connected by a light, flexible cord passing around a fixed, frictionless pulley.

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Respuesta :

The magnitude of the horizontal force necessary to drag block b to the left at constant speed is 2.52 N.

Calculation:-

F - T -f₁ - f₂ = 0

⇒ F = -T + f₁ + f₂

f₂ = μk(ma + mb)g

f₁ = μkmag

T = Îźmag

F = Îźmag + Îźkmag + Îźk(ma+mb)g

F = 3 × 0.30 × 1.40 + 0.30 × 4.20 = 2.52 N

Force is a push or pulls upon an item because of the object's interaction with some other object. pressure is a power that can exchange the motion of an object. A force can reason an object with mass to alternate its speed, i.e., to boost up. pressure also can be described intuitively as a push or a pull. A force has each significance and course, making it a vector amount.

The phrase 'Force' has a unique meaning. At this degree, it is absolutely appropriate to describe a force as a push or a pull. A force is not something that an object consists of or 'has in it. A force is exerted on one object through another. The concept of a force isn't always restricted to living matters or non-living matters.

Learn more about force here:-https://brainly.com/question/12970081

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