contestada

Please please please help with b

The diameters of two circular pulleys are 6cm and 12 cm, and their centres
are 10cm apart.

a. Angle a = 72.54 degrees

b. Hence find, in centimetres correct to one decimal place, the length of a
taut belt around the two pulleys

Please please please help with b The diameters of two circular pulleys are 6cm and 12 cm and their centres are 10cm apart a Angle a 7254 degrees b Hence find in class=

Respuesta :

The length of the belt around the two pulleys is approximately 49.2 centimeters.

How to determine the length of the belt around the two pulleys?

In this question we must determine the perimeter of a belt around two pulleys, whose centers are 10 centimeters apart. This perimeter is the sum of part of the circumference of small pulley, part of the circumference of the big pulley and two times the segment tangent to the two pulleys.

Now we proceed to determine the parts of the perimeter of the belt:

Big pulley

s' = (214.92° / 180°) · π · (6 cm)

s' ≈ 22.506 cm

Small pulley

s'' = (145.08° / 180°) · π · (3 cm)

s'' ≈ 7.596 cm

Tangent segments

l = (10 cm) · sin 72.54°

l ≈ 9.539 cm

Lastly, the perimeter of the belt is:

L = s' + s'' + 2 · l      (1)

L = 22.506 cm + 7.596 cm + 2 · (9.539 cm)

L = 49.180 cm

The length of the belt around the two pulleys is approximately 49.2 centimeters.

To learn more on belts drives: https://brainly.com/question/25351775

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