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3 years ago

8

If the net force on an object is zero then the object has

1 answer:

Pavlova-9 [17]3 years ago

6 0

Answer:

<em>If the net force is zero, then the body has an acceleration = 0 m/s²</em>

Explanation:

<em>Force: </em>This is defined as the product of mass of a body and its acceleration. Force is a vector quantity because it can be represented both in magnitude and in direction. The S.I unit of force is<em> Newton (N).</em>

<em>Net Force: </em><em>This is the vector sum of all the the forces acting on a body.</em>

<em>Forces acting in the same direction are added while those acting in opposite directions are subtracted.</em>

<em>Example, if two forces F₁ and F₂ act on a body, in opposite direction, The net force F₃ is express below</em>

<em>F₃ = ma = F₁ - F₂ in the direction of F₁</em>

<em>From the example above, If the net force is zero, then the body has an acceleration = 0 m/s²</em>

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A gas‑forming reaction produces 1.90 m 3 1.90 m3 of gas against a constant pressure of 179.0 kPa. 179.0 kPa. Calculate the work

goldfiish [28.3K]

Answer:

The work done is 3.4 × 10⁵ J.

Explanation:

Given:

Pressure of the gas produced (P) = 179 kPa

Volume of the gas produced (ΔV) = 1.90 m³

We need to find the work done in joules. For that, we don't need any conversion as the units are already in SI units which will give the result in Joules only.

Now, let us verify our results by using conversion factors and without using them.

Using conversion factors:

1 m³ = 1000 L

So, 1.90 m³ = 1.90 m³ × 1000 $\frac{L}{m^3}$ = 1900 L

Also, 1 atm = 101.325 kPa

So, 179 kPa = 179 kPa × $\frac{1\ atm}{101.325\ kPa}$ = 1.767 atm

Now, work done in a constant pressure process is given as:

Work = Pressure × Volume change

Work = P × ΔV

Work = 1.767 atm × 1900 L

Work = 3.36 × 10³ atm-L

Now, again using the energy conversion for work.

1 atm-L = 101.325 J

So, 3.36 × 10³ atm-L = 3.36 × 10³ atm-L × $\frac{101.325\ J}{1\ atm-L}$ = 3.4 × 10⁵ J

Therefore, the work done is 3.4 × 10⁵ J.

Now, let us verify the above result without any conversion.

Work = P × ΔV = 179 × 1000 × 1.90 = 3.4 × 10⁵ J.

Therefore, the work done is same by both ways.

Hence the work done is 3.4 × 10⁵ J.

8 0

3 years ago

The graph shows you three different projections of human population growth

MA_775_DIABLO [31]

The answer is going to be B

3 0

2 years ago

You have a rod with a length of 146.4 cm. You prop up one end on a brick which is 3.8 cm thick. Your uncertainty in measuring th

AfilCa [17]

Answer:

$\partial \theta = 0.003$

Explanation:

we know that

$sin\theta = \frac{3.8}{146.4}$

$\theta = sin^{-1} \frac{3.8}{146.4}$

$\theta = 1.484°$

$\theta = 1.484° *\frac{\pi}{180} = 0.0259 radians$

as we see that $sin\theta = \theta$

relative error $\frac{\partial \theta}{\theta} = \frac{\partial X}{X_1} +\frac{\partial X}{X_2}$

Where X_1 IS HEIGHT OF ROCK

$X_2$ IS THE HEIGHT OF ROAD

$\partial X$ = uncertainity in measuring distance

$\partial X = 0.05$

Putting all value to get uncertainity in angle

$\frac{\partial \theta}{0.0259} = \frac{0.05}{3.8} +\frac{0.05}{146.4}$

solving for $\partial \theta$ we get

$\partial \theta = 0.003$

3 0

3 years ago

Muscles use force to move objects. When using a ramp to do work, would your muscles use more force or less force?

White raven [17]

Less because the ramp is letting off force but i does depend on the way you are going on the ramp

7 0

2 years ago

Read 2 more answers

A: How far did she travel? <br><br><br><br> B: How long did she take?

allochka39001 [22]

A. 60 miles
B. 5 hours

Unless you are looking for slope, in which case the answer is different

7 0

2 years ago