Calculate drop shock force, mass, drop height, or impact duration by selecting a solve mode and entering its three required values. Uses fixed g = 9.81 m/s².

Use mass, free-fall height and stopping time.

Ideal drop from rest, no rebound. Uses g = 9.81 m/s². Estimates an average net force, not peak force or a safety rating.

From first contact until the object stops.

Related Calculators

Drop Shock Formula

The following equation estimates the average net stopping force for a vertical drop from rest, without rebound or air resistance. It does not calculate peak force.

F = m × sqrt(2 × g × h) / t
  • Where F is the average upward net stopping force (N)
  • m is the mass (kg)
  • h is the drop height (m)
  • t is the stopping time from first contact until rest (s)
  • g is the gravitational acceleration (9.81 m/s²)

To calculate the drop shock force, multiply the mass by the square root of twice the gravitational acceleration and drop height, then divide by the impact duration.

What is a Drop Shock?

Definition:

Drop shock describes the loading when a dropped object stops on impact. This ideal model estimates average net stopping force. On a horizontal surface, average contact force equals this result plus mg; peak force needs the actual force-time profile. It is not a safety certification.

How to Calculate Drop Shock?

Example Problem:

The following example outlines the steps and information needed to calculate the drop shock force.

First, determine the mass. In this example, the mass is 10 kg.

Next, determine the drop height. In this example, the drop height is 5 m.

Then, determine the impact duration. In this example, the impact duration is 0.2 s.

Finally, calculate the shock force using the formula above:

F = m * sqrt(2 * g * h) / t

F = 10 * sqrt(2 * 9.81 * 5) / 0.2

F ≈ 495.2272 N (average net force; average contact force ≈ 593.3272 N)

FAQ

What factors can affect the drop shock force?

Various factors including the object’s mass, drop height, and impact duration, as well as material properties and surface characteristics, can influence the resulting shock force.

How can the drop shock force be minimized?

To minimize the drop shock force, consider using energy-absorbing materials, cushioning surfaces, or increasing the impact duration through design modifications.

Why is understanding drop shock important?

Understanding drop shock is important in fields such as packaging, product safety, and material testing, where impact forces need to be managed to prevent damage or failure.