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IgorC [24]
3 years ago
5

4. A football player has a mass of 75 kg, and he is running with a velocity of 18 m/s. What is his momentum? Answer:​

Physics
1 answer:
irinina [24]3 years ago
8 0

Answer:

1350kgm/s

Explanation:

Given parameters:

Mass of footballer = 75kg

Velocity  = 18m/s

Unknown:

Momentum  = ?

Solution:

The momentum of a body is the quantity of motion it posses.

  It is mathematically given as:

  Momentum  = mass x velocity

  Momentum  = 75 x 18

   Momentum  = 1350kgm/s

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In magazine car tests an important indicator of performance is the zero to 60 mph (0 to 96.6 km/h) acceleration time. A time bel
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Answer:

2.73414 seconds

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Explanation:

t = Time taken

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v=60\times \dfrac{1609.34}{3600}=26.822\ m/s

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s=ut+\frac{1}{2}at^2\\\Rightarrow 36.66766=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{36.66766\times 2}{9.81}}\\\Rightarrow t=2.73414\ s

or

v=u+at\\\Rightarrow t=\dfrac{v-u}{a}\\\Rightarrow t=\dfrac{26.822-0}{9.81}\\\Rightarrow t=2.73414\ s

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The change in potential energy is 467622.66798 J

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Explanation:

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