Question

Lifting a sack full of rice grains.it is which motions???​

Answer 1

Floating Rice Friction

Friction is a force we hear about everyday and often don’t notice, but we can’t underestimate its power. In fact, we’re going to lift a bottle of rice with just the power of friction in today’s demo.

What You Need?

A empty plastic water bottle

Uncooked rice

A pencil

What to Do?

Fill the empty bottle to the top with rice (tap the bottle against the counter to help the rice settle). Slowly push the pencil (point down) into the bottle, and slowly pull it up again. Repeat this motion; it will become increasingly difficult to push the pencil down. Eventually, you won’t be able to pull out the pencil anymore; you’ll be able to pick up the bottle with the pencil instead!