float impact;
// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  analogReference(INTERNAL);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (1.1 / 1023.0); 
  impact = voltage*200;
  // print out the value you read:
  Serial.print(voltage);Serial.print("V\t");
  Serial.print(impact,0);Serial.println("g");
  delay(200);
}