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Juli2301 [7.4K]
3 years ago
11

Two football players collide head-on in midair while trying to catch a thrown football and cling together. The first player is 9

4 kg and has an initial velocity of 6 m/s, while the second player is 116 kg and has an initial velocity of -5 m/sn the next three parts, (d) through (f), justify that friction could be ignored compared to the forces of collision by considering the change in momentum of the first player. Let's assume that the collision lasts for 10ms. Calculate the force on the first player by the second player during the collision
Physics
1 answer:
QveST [7]3 years ago
3 0

Answer:

F = 57116.2 N

Explanation:

As we know that during collision the force between two players due to all external factors is very small or negligible

So we can use momentum conservation to find the final common speed

m_1v_1 + m_2v_2 = (m_1 + m_2) v

so we have

94(6) + (116)(-5) = (94 + 116) v

v = -0.076 m/s

now we can find acceleration which is defined as rate of change in velocity

So it is given as

a = \frac{v_F - v_i}{\Delta t}

a = \frac{-0.076 - 6}{10 \times 10^{-3}}

a = - 607.62 m/s^2

Now force on first player is given as

F = ma

F = 94 \times (607.62)

F = 57116.2 N

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Answer:

240 ohms

Explanation:

From Ohms law we deduce that V=IR and making R the subject of the formula then R=V/I where R is resistance, I is current and V is coltage across. Substituting 120 V for V and 0.5 A for A then

R=120/0.5=240 Ohms

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Explanation:

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Two spherical objects have masses of 3.1 x 10^5 kg and 6.5 x 10^3 kg. The gravitational attraction between them is 65 N. How far
nata0808 [166]

Answer:

4.55 x 10⁹m

Explanation:

Given parameters:

Mass of object 1  = 3.1 x 10⁵kg

Mass of object 2 = 6.5 x 10³kg

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Unknown:

Distance between them  = ?

Solution:

To solve this problem, we use the expression below from the universal gravitational law;

    Fg  =    \frac{G mass 1 x mass 2}{distance ^{2} }  

   G = 6.67 x 10⁻¹¹

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3 0
3 years ago
Assuming the diode is ideal but with a forward voltage drop of. 65 volts, what is the current in ma if v1=0v, and r1=490ω?
weeeeeb [17]

The current in the ideal diode with forward biased voltage drop of 65V is 132.6 mA.

To find the answer, we have to know more about the ideal diode.

<h3>What is an ideal diode?</h3>
  • A type of electronic component known as an ideal diode has two terminals, only permits the flow of current in one direction, and has less zero resistance in one direction and infinite resistance in another.
  • A semiconductor diode is the kind of diode that is used the most commonly.
  • It is a PN junction-containing crystalline semiconductor component that is wired to two electrical terminals.
<h3>How to find the current in ideal diode?</h3>
  • Here we have given with the values,

                       V_2=65V\\V_1=0V\\R_1=490Ohm.

  • We have the expression for current in mA of the ideal diode with forward biased voltage drop as,

                I=\frac{V_2-V_1}{R_1} =\frac{65}{490} =132.6mA

Thus, we can conclude that, the current in mA of the ideal diode with forward biased voltage drop of 65 V is 132.6.

Learn more about the ideal diode here:

brainly.com/question/14988926

#SPJ4

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A bus can travel 63 miles in 1.4 hours. If its speed is increased
Evgesh-ka [11]

Answer:

200

Explanation:

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