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## Homework Statement

A bicycles accelerates from rest, covering 16 metres in 4 seconds. The total mass of the bicycle and its rider it 90kg. What is its average acceleration during this time?

## Homework Equations

x = ut + 0.5at^2

v=xt

a=vt

## The Attempt at a Solution

v = x/t

v = (16)/(4)

v = 4 m/s

F = mv/t

F = (90)(4)/4

Fnet = 90N

Fnet = ma

90 = 90a

A= 1 m/s^2

**<--WRONG!! - How?**

A=2ms <--- RIGHT