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## Homework Statement

A small truck of mass 1600kg rides in a circle of which has a radius of 40m at a constant speed of 70m/s

Calculate:

(a) its centripetal acceleration

(b)the centripetal force acting.

## Homework Equations

[itex]

a_{centripetal} = {v^2 \over r} \\

F_{centripetal} = {mv^2 \over r}

[/itex]

## The Attempt at a Solution

I think I got the correct answers its just the figures seem absurdly high, so can someone check my understanding please?

So for part a

[itex]

a_{centripetal} = {70^2 \over 40} \\

a_{centripetal} = 122.5 m/s^2

[/itex]

And part b

[itex]

F_{centripetal} = \frac{1600 \times 70^2}{40} \\

F_{centripetal} = \frac{7840000}{40} \\

F_{centripetal} = 196kN

[/itex]

The figures just seem to high to me, we only had one lesson on this so I may have taken down something wrong or might have misunderstood the question.