Draw the shapes of distance -time graph for the motion in the following cases :
a)A car moving with a constant speed.
b)A car parked on a side road.
c)A car moving with a changing speed.
Answers
Answer:
They are designed not to.
Generally, the coefficient of friction between the tires and the road surface (about 0.8) is less than half the track (distance between the wheels on one axle) divided by the height of the centre of mass of the car. So if the car makes too sharp a turn on a flat road, it will skid rather than flip. If the road has substantial reverse camber, or the centre of mass is elevated by a large load on the roof, or the vehicle is very tall (e.g. Unimog) this may not be true. If the car slides but then hits a kerb, it may still flip.
Regular cars for street use are designed with a low centre of mass so that they won’t flip in normal circumstances. Racing cars with performance tires (with a higher coefficient of friction) are designed with an even lower centre of mass.
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