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TOXICR691IN
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1. A 2.3 lb block is resting on a horizontal surface (μs=0.15) and is being pulled by a force (P) at a 23° below the horizontal. Determine the force (P) in pounds (lb) that would make the block start moving

2. Determine the tension (T1 and T2) in Newtons (N) on the two strings connected to the surfaces

3. What should be the coefficient of friction (μk) of the inclined plane to block A if block B and C is ascending at a constant velocity, and:
a. Block B = 2700g
b. Block B = 0.23 slugs
(1 slug = 14.5939)​

1 A 23 Lb Block Is Resting On A Horizontal Surface Μs015 And Is Being Pulled By A Force P At A 23 Below The Horizontal Determine The Force P In Pounds Lb That W class=

Sagot :

JPALER264IN

1 The formula to calculate the coefficient of friction is μ = f÷N. The friction force, f, always acts in the opposite direction of the intended or actual motion, but only parallel to the surface.

2 We can think of a tension in a given rope as T = (m × g) + (m × a), where "g" is the acceleration due to gravity of any objects the rope is supporting and "a" is any other acceleration on any objects the rope is supporting.

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