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Tju [1.3M]
3 years ago
8

The average standard rectangular building brick has a mass of 3.10 kg and dimensions of 225 m x 112 m x 75 m. The gravitational

field constant g = 9.8 N/kg. Calculate the maximum pressure created by brick
Physics
1 answer:
zzz [600]3 years ago
5 0

Answer:

P=3.61\times 10^{-3}\ Pa

Explanation:

Given that,

Mass of a brick, m = 3.1 kg

The dimensions of the brick 225 m x 112 m x 75 m

We need to find the maximum pressure created by the brick. We know that, the force acting per unit area is called pressure exerted. It is given by the formula as follows :

P=\dfrac{F}{A}

F = mg

A = area with minimum dimensions i.e. 112 m x 75 m

Pressure is maximum when the area is least.

So,

P=\dfrac{mg}{A}\\\\P=\dfrac{3.1\times 9.8}{112\times 75}\\\\P=3.61\times 10^{-3}\ Pa

So, the maximum pressure created by brick is 3.61\times 10^{-3}\ Pa.

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The wheel having a mass of 100 kg and a radius of gyration about the z axis of kz=300mm, rests on the smooth horizontal plane.a.
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Answer:

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From Newton's second law of motion, F = m × a

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By substituting the values we get, a = 2 m/s²

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By substituting the values we get

v = 0 + 2 × 3 = 6 m/s

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∴ Radius of the wheel = 300 mm

Torque acting on the wheel about axis of rotation = 300 mm × 200 N =

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60 = 9 × (angular acceleration)

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As angular acceleration of the wheel is constant, we can use the below formula for calculation of final angular speed

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By substituting the values we get

w_{f} = 6·67 × 3 = 20 rad/s

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Answer:

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