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AfilCa [17]
3 years ago
7

A pitcher exerts 100.0 N of force on a ball with a velocity of 45 m/s. What is the pitcher's power?

Physics
1 answer:
Andreas93 [3]3 years ago
7 0
The pitcher's power is given by the formula P= fxv
P=100x 45m/s= 4500 Watts
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The normal force must equal the weight.

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An electron moving parallel to a uniform electric field increases its speed from 2.0 × 107 m/s to 4.0 × 107 m/s over a distance
jeka94

Answer:

1.8\times 105 N/C

Explanation:

We are given that

u=2\times 10^7 m/s

v=4\times 10^7 m/s

d=1.9 cm=\frac{1.9}{100}=0.019 m

Using 1m=100 cm

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v^2-u^2=2as

Using the formula

(4\times 10^7)^2-(2\times 10^7)^2=2a(0.019)

16\times 10^{14}-4\times 10^{14}=0.038a

0.038a=12\times 10^{14}

a=\frac{12}{0.038}\times 10^{14}=3.16\times 10^{16}m/s^2

q=1.6\times 10^{-19} C

Mass of electron,m=9.1\times 10^{-31} kg

E=\frac{ma}{q}

Substitute the values

E=\frac{9.1\times 10^{-31}\times 3.16\times 10^{16}}{1.6\times 10^{-19}}

E=1.8\times 105 N/C

7 0
3 years ago
What is the function of the wire in
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I think the right answer is option B.

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How much force is needed to accelerate a vehicle with a mass of 1000 kg at a rate<br> of 5 m/s2?
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The force needed to accelerate a vehicle with a mass of 1000kg at a rate of 5m/s2 would be 5000
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Water with a volume flow rate of 0.001 m3/s, flows inside a horizontal pipe with diameter of 1.2 m. If the pipe length is 10m an
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Answer:

\triangle P=1.95*10^{-4}

Explanation:

Mass m=0.001

Diameter d=1.2m

Length l=10m

Generally the equation for Volume flow rate is mathematically given by

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 V=\frac{Q}{\pi/4D^2}

 V=\frac{0.001}{\pi/4(1.2)^2}

 V=8.84*10^{-4}

Generally the equation for Friction factor is mathematically given by

 F=\frac{64}{Re}

Where Re

Re=Reynolds Number

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 Re=\frac{1000*8.84*10^{-4}*1.2}{1.002*10^{-3}}

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Therefore

 F=\frac{64}{Re}

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Generally the equation for Friction factor is mathematically given by

 Head loss=\frac{fLv^2}{2dg}

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 H=19.9*10^{-9}

Where

H=\frac{\triangle P}{\rho g}

\triangle P=\frac{19.9*10^{-9}}{10^3*(9.81)}

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\triangle P=1.95*10^{-4}

 

6 0
3 years ago
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