# Impact G Force Calculator, Formula, Impact G Force Calculation

## Impact G Force Calculator:

Enter the values of velocity before impact, v(m/s) and deceleration distance, d(m) to determine the value of impact G-Force, IGF(Gs).

 Enter Velocity Before Impact: m/s Enter Deceleration Distance: m Result – Impact G-Force: Gs

## Impact G Force Formula:

The impact G-force formula is used to calculate the force experienced by an object upon impact, translating its kinetic energy at the moment before impact into a force experienced over the distance through which it decelerates.

Impact G-Force, IGF(Gs), is calculated as the deceleration divided by the standard acceleration due to gravity (9.81 m/s²), where the deceleration is derived from the change in velocity squared, v(m/s) in metre per second is divided by twice the distance over which the deceleration occurs, d(m) in metres.

Impact G-Force, IGF(Gs) = v2(m/s) / 2 * d(m) * 9.81

IGF(Gs) = impact G-Force in Gs.

v2(m/s) = velocity before impact in metre per second, m/s.

d(m) = deceleration distance in metres, m.

Impact G Force Calculation:

1. An object falls and impacts the ground with a velocity of 10 m/s, compressing a cushioning material to a depth of 0.25 metres upon impact. Determine the impact G-force absorbed by the cushion.

Given: v2(m/s) = 10m/s,  d(m) = 0.25m.

Impact G-Force, IGF(Gs) = v2(m/s) / 2 * d(m) * 9.81

IGF(Gs) = 102 / 2 * 0.25 * 9.81

IGF(Gs) = 20.39Gs.

1. Suppose an object impacts a surface at a speed of 15 m/s, and the impact G-force experienced is 30 Gs. Find the distance over which the object decelerates.

Given: v2(m/s) = 15m/s,  IGF(Gs) = 30Gs.

Impact G-Force, IGF(Gs) = v2(m/s) / 2 * d(m) * 9.81

d(m) = v2(m/s) / 2 * IGF(Gs) * 9.81

d(m) = 152 / 2 * 30 * 9.81

d(m) = 0.382m.