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Alexus [3.1K]
3 years ago
12

The drag force due to air resistance on a soccer ball traveling through the air at 20 m/s is 2.3 N. What is the drag force on th

at same soccer ball when it is moving through the air at 35.4 m/s
Physics
1 answer:
Aneli [31]3 years ago
3 0

The drag force on that same soccer ball when it is moving through the air at 35.4 m/s is 7.2 Newton.

Given the data in the question;

  • Initial speed; v_1 = 20m/s
  • Initial drag force; F_1 = 2.3N
  • Final speed; v_2 = 35.4m/s

Final drag force; F_2 =\ ?

From Newton's laws, Drag force is directly proportional to velocity squared:

F\ \alpha \ v^2 \\\\F = Kv^2

Where k is the constant of proportionality.

Hence;

\frac{F_1}{F_2} = \frac{V_1^2}{V_2^2}

We make "F_2" the subject of the formula

F_2 = \frac{F_1 * v_2^2}{v_1^2}

We substitute our values into the equation;

F_2 = \frac{2.3N * (35.4m/s)^2}{(20m/s)^2}\\\\F_2 = \frac{2.3N * 1253.16}{400} \\\\F_2 = \frac{2882.268N}{400}\\\\F_2 = 7.2N

Therefore, the drag force on that same soccer ball when it is moving through the air at 35.4 m/s is 7.2 Newton.

Learn more: brainly.com/question/2867185

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How much work is done by the force lifting a
Ann [662]

The work done in lifting the hamburger is equal to the increase in gravitational potential energy of the hamburger, given by

W=\Delta U=mg \Delta h

where

m=0.1 kg is the mass of the hamburger

g=9.81 m/s^2 is the gravitational acceleration

\Delta h=0.3 m is the increase in height of the hamburger


Substituting numbers into the equation, we find

W=(0.1 kg)(9.81 m/s^2)(0.3 m)=0.3 J


So, the correct answer is

(3) 0.3 J

3 0
3 years ago
Silver has a mass of 10.5 grams and a volume of 19.3 cm3. What is its density?
Neko [114]

Answer:

<h3>The answer is 0.54 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{10.5}{19.3}  \\  = 0.54404145...

We have the final answer as

<h3>0.54 g/cm³</h3>

Hope this helps you

7 0
3 years ago
Mike is cutting the grass using a human-powered lawn mower. He pushes the mower with a force of 45 n directed at an angle of 41Â
Andrej [43]

Answer:

work done will be equal to 305.05 J

Explanation:

We have given force exerted F = 45 N

Angle with the horizontal \Theta =41^{\circ}

Distance moved due to exerted force d = 9.1 m

Work done is equal to W=Fcos\Theta \times d , here F is force \Theta is angle with horizontal and d is distance moved due to force

So work done W=45\times cos41^{\circ}\times 9.1=309.05J

So work done will be equal to 305.05 J

7 0
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How does the friction get affected by the nature of surface?
aleksley [76]

Answer:

The heat causes the molecules on rubbing surfaces to move faster and have more energy.

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Answer:

145.8m

Explanation:

The toss distance is given by:

x=v_0^2*\frac{sin(2\phi)}{g} ,(g=9.8m/s^2)

7 0
3 years ago
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