Question

vehicle carrying inflammable material usually have matellic rope touching the ground during motion?? I already know the answer but I can't understood it so can you please elaborate elaborate answer in simple language

Answer 1

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հίί ʍαtε_______✯◡✯
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һєяє' ʏȏȗя ѧṅśwєя ʟȏȏҡıṅɢ ғȏя________
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✯♦In case, the charge accumulation becomes large, it may prove hazardous to the vehicle carrying inflammable materials.
Due to air friction, the body of vehicle also gets charged in addition to the charge developed on tyres.
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The body of the moving vehicle gets charged due to friction with air. If these charges produce sparks, the vapours which escape from the inflammable substance may catch fire and it may become hazardous. To avoid this, metal ropes attached to the vehicle's body are allowed to touch the ground, so that the charges are conducted away to the earth. 
♦ So that, it does not happen, metallic ropes from the vehicle are made to touch the ground. Due to this, the charge on the vehicle leaks to the earth.

$hope \: it \: helps$
!!#BRAINLY✌✌✌⭐

Answer 2

In case, the charge accumulation becomes large, it may prove hazardous to the vehicle carrying inflammable materials.

Due to air friction, the body of vehicle also gets charged in addition to the charge developed on tyres.

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The body of the moving vehicle gets charged due to friction with air. If these charges produce sparks, the vapours which escape from the inflammable substance may catch fire and it may become hazardous. To avoid this, metal ropes attached to the vehicle's body are allowed to touch the ground, so that the charges are conducted away to the earth.

♦ So that, it does not happen, metallic ropes from the vehicle are made to touch the ground. Due to this, the charge on the vehicle leaks to the earth.