Automobile Engineering in ME
The main task of a battery in automobiles is to

Act as a reservoir or stabilizer of electricity
Supply a large amount of power to turn the starter motor when the engine is being started
Supply electricity to the alternator
Supply electricity to the vehicle's electrical system at all times while the engine is running

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Automobile Engineering in ME
The rigid suspension is beneficial when

It is desired to improve tyre to ground contact characteristics
It is desired to have more flexibility in design
Large changes in load make it necessary to have a large suspension stroke
It is desired to reduce the unsprung mass

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Automobile Engineering in ME
When the front wheels of a vehicle are locked during braking, then

Stopping distance becomes extremely long
Rear tyres skid across the road surface, and the vehicle spins around
Front tyres skid across the road surface, and the vehicle spins around
Driver loses control over the steering, and the vehicle continues moving in its current direction

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