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kherson [118]
3 years ago
6

a body of mass 5kg falls from height of 10m above the ground what kinetic energy of the body before it strike the ground

Physics
1 answer:
Snowcat [4.5K]3 years ago
4 0
Gravitational Potential Energy (GPE) before fall = Kinetic energy on impact
GPE = mgh
GPE = 5kg x 9.8m/s^2 x 10m
GPE = 490 J
Kinetic Energy = 490 J

(This is assuming that gravitation field strength (g) is 9.8m/s^2, sometimes       you may round this to 10m/s^2, therefore making the final result: 
  Kinetic energy = 500 J)
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A train takes 2h to reach station B from station A and 3h to return back to A.The distance between the station is 200km, then it
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Read 2 more answers
An electric car uses a 45-kW (160-hp) motor. If the battery pack is designed for 340V, what current would the motor need to draw
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Answer:

Current = 132.35 A

The motor needs to draw 132.35 Amperes current from the battery.

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The formula of electric power is given as follows:

Power = (Voltage)(Current)

Current = Power/Voltage

In this question, we have:

Power = 45 KW = 45000 W

Voltage of Battery Pack = 340 V

Current needed to be drawn = ?

Therefore,

Current = 45000 W/340 V

<u>Current = 132.35 A</u>

<u>The motor needs to draw 132.35 Amperes current from the battery.</u>

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