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svet-max [94.6K]
3 years ago
8

Please help me with b) and c)

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
8 0

Answer:

i dont know that answer

Step-by-step explanation:

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A miners' cage of mass 420 kg contains 3 miners of total mass 280 kg. The cage
svp [43]

Answer:

5817 Newtons.

Step-by-step explanation:

Total mass of the cage + the miners = 700 Kg which is a downward force of  700g N.

The net downward force = 700g - T where T is the tension (force) in the cable. The g = acceleration due to gravity = 9.81 m s-2.

We  calculate the  acceleration of the cage by using an equation of motion:

Distance = ut + 1/2 a t^2     where u = initial velocity , t = time and a = acceleration:

75 = 0(t) + 1/2 a (10^2)

50a =  75

a = 1.5 m s-2.

So using Newtons second law of motion

Force = mass * acceleration:

700*9.81 - T = 700 * 1.5

T = 700 * 9.81 - 700*1.5

= 5817 N.

8 0
4 years ago
If
KengaRu [80]

Answer:

2112

Step-by-step explanation:

4752÷36= 132

132×16=2112

5 0
3 years ago
PLEASE ANSWER + BRAINLIEST!!!!
Nookie1986 [14]
Plug in 6 for x and solve out for f(x)
8 0
3 years ago
The perimeter of a rectangle is 40 cm. The length is 14 cm. Let x = width of the rectangle. Ravi says he can find the width usin
Usimov [2.4K]

Answer:

Divide both sides by 2

Step-by-step explanation:

We have the equation

2(x + 14) = 40

We divide both sides by 2

2(x + 14) = 40/2

x + 14 = 20

x = 20 - 14

x = 6

Therefore, the most helpful first step for solving Ravi's equation is: Divide both sides by 2

3 0
3 years ago
Show that angle a+ angle b is equal to angle d​
mr_godi [17]

sum of two angles of triangle are equal to the exterior angle of triangle

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3 years ago
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