Automobile Engineering in ME
A front stabilizer bar is used to

All of the listed here
Control suspension movement and body roll
Provide a softer ride
Increase vehicle load carrying capacity

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Automobile Engineering in ME
The main function of the tread pattern on tyre is that

The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
The crests between the tread grooves absorb road noise

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