History of Newton's Cradle: Newton's cradle (also known as Newton's balls or Executive Ball Clicker), named after English 17th century scientist Isaac Newton, is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres; a force is transmitted through the stationary spheres and pushes the last sphere upward. Newton's Laws of Motion: "For every action there is an equal and opposite re-action." Fine argument of Newton's law of motion and the starting point of physics. Inspired us to better understand the concept of conservation of momentum. Demonstrates Conservation of mechanical energy. Newton Cradle will never be outdated. It's great for physical teachers, students, office workers, kids, men and women at all ages. Specifications: Size: 3.54x2.95x3.54 inch Material: Solid wood+ Fishing line+ Stainless steel balls & structure Occasions: Science Education supplies, Psychotherapy, Stress release, Leisure and entertainment, Birthday present, Holiday gifts, Business gifts Package including: 1x Frame with 5 balls 1x Wooden Base Warm Prompt: 1, When you use this newton's cradle, please move it in a horizontal line, so the lines will not be tangled. 2, If it was tangled, you could untangle it still with some patience and time, then you will fix it. It's also a challenge for you, why not have a try?How to untangle it: Firstly, please figure out how the wires were tangled, then follow the wires to untangle it, and you can untangle it in few mins.Warranty:Any problem with our newton's cradle, please contact us firstly, you don't have to return it back, we promise to offer you a free replacement or a full refund immediately.
S**8
Disappointed
I know it said small in the description, but this really IS small! Difficult to put together, tacky and uneven. Extremely disappointing. I really SHOULD read reviews before buying. The motion only lasts about 10 seconds too (see video). Pay more on a bigger sturdier product is my advice
R**A
Remember the physics lessons
I bought this to give it as a gift to my managerThis is quite unique idea that remember your physics lessons. Good to have it in your office table.
B**A
the only reason i haven't returned is because i just ...
the only reason i haven't returned is because i just thrown it away. Couldn't put the bars in the frame , the bars didn't fit into the frame and all the balls got tangled. small and cheap material.
B**S
Rubbish
What an absolute disappointment, so small , poles didn't fit into Base, and all tangled up , when I tried to untangle it the wires snapped. Would not recommend this item .
J**H
Very disappointed
Not worth spending your money on this very cheap looking item , does not work as a cradle should work .
D**6
It is what it is
Good quality & fast delivery. No issues
N**J
Broken
Came out the box broken - one very unhappy recipient! Was supposed to be a Christmas Present ...
N**E
Disappointed
Disappointed the balls were tangled almost immediately whilst unboxingWouldn’t buy again
Trustpilot
2 weeks ago
1 day ago