WOMAN CLEVERLY SHOWCASES WHY WALKING BACKWARDS WITH YOUR HAND IN A CLAW GRIP OVER A COFFEE MUG REDUCES THE CHANCE TO SPILL

According to Oxford Sparks' Sophie Abrahams, sloshing—which can result in spills—can be minimised by walking backwards while holding a coffee mug in a claw grip. Jiwon Han, a Korean student, discovered this concept and used his research to support his thesis.

In essence, a human hand's natural frequency is the same as coffee in a mug. The coffee sloshed in time with the hand's forward motion. Reversing course reduces the slosh factor by altering the frequency ratio between the coffee and the hand.

An average-sized mug's natural frequency is approximately 4 hertz or 4 sloshes back and forth per second. The problem is that your hand's forward and backward motion while you walk also occurs at a speed of roughly 4 hertz. .. Han recommended using the claw grip or taking a step backwards to prevent spilling coffee. The claw grip and walking backwards both alter your body's natural motion. Han demonstrated how applying these two techniques alters hand motion to approximately 1.7 hertz.