3 years ago

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Physics

1 answer:

hammer [34]3 years ago

3 0

Answer:

imma go with either b or A

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A worker pushes a crate horizontally across a warehouse floor with a force of 245 N at an angle of 55 degrees below the horizont

aev [14]

Answer:

option A

Explanation:

given,

For exerted by the worker = 245 N

angle made with horizontal = 55°

we need to calculate Force which is not used to move the crate = ?

Movement of crate is due to the horizontal component of the force.

Crate will not move due to vertical force acting on the it.

$F_y = F sin \theta$

$F_y = 245\times sin 55^0$

$F_y =200.69$

hence, worker's force not used to move the crate is equal to 200.69

The correct answer is option A

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3 years ago

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If the coefficient alpha for a stress scale was computed to be 0.80, the scale would be:

Lina20 [59]

If the coefficient alpha for a stress scale was computed to be 0.80, the scale would be strongly reliable. A coefficient alpha that is at least 0.70 and above is considered to have a strong internal consistency, which means the items in the scale are closely related as a group.

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3 years ago

Every object that has mass attracts every other object with a gravitational force: It has been proven that the size of the

denpristay [2]

Answer:

this is a law because it is a constant fact of nature

Explanation:

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3 years ago

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Q.1- A 3000 cm3 tank contain O2 gas at 20 °C and a gauge pressure of 2.5 x 106 Pa. Find the mass of oxygen in the tank.

exis [7]

20c because te mass of the object is larger than the table

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3 years ago

A mother is helping her children, of unequal weight, to balance on a seesaw so that they will be able to make it tilt back and f

horsena [70]

Answer:

L₁ = W×L / w

Explanation:

The scenario is shown in the image below.

At the pivot point, the torque acting on this point must be zero so that there will be easy back and forth without the heavier child.

Torque created by lighter child + Torque created by the heavier child = 0

Thus,

According to the axis system, the heavier child is left to the pivot (origin), so,

W×(- L ) + w× L₁ = 0

So,

L₁ = W×L / w

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4 years ago