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Car going round a bend

A car of mass 1500kg goes round a circular bend of radius 50m at a constant speed of 25m/s.

a) Is the car accelerating? Explain your answer.

b) The resultant force must be acting in which direction?

c) Calculate the size of this force.

d) What provides this force?

e) Under what conditions might this force not be big enough and what would happen if it weren't?