Product Information
Physics Demonstration / Collisions Newton’s Cradle – Five Steel Ball Pendulum
Demonstrate collision behaviour and the transfer of momentum and energy with Newton’s Cradle, a classic physics teaching apparatus featuring five steel balls suspended in a straight line by paired wires.
Illustration is schematic and may not match the exact supplied frame or ball spacing.
What Is Newton’s Cradle?
A visual introduction to momentum and collisions
Newton’s Cradle, also called Newton’s Pendulum, consists of steel balls suspended in a straight line so that neighbouring balls touch or sit closely together. When a ball at one extreme is displaced and released, the collision transfers momentum through the row, and a ball at the opposite extreme moves outward in the idealised demonstration.
This apparatus helps students explore momentum transfer, energy transfer and the behaviour of collisions. In a real experiment, sound, friction, air resistance and small imperfections cause energy loss, so the motion gradually decreases.
Quick answer: Newton’s Cradle is a physics demonstration instrument used to illustrate collisions and the approximate transfer of momentum and energy between suspended balls.Product Specifications
Key dimensions and construction details
5 Steel balls15 mm Minimum ball diameter120 mm Suspension wire length
Product Name Newton’s Cradle (Newton’s Pendulum) Number of Balls 5 steel balls Suspension Arrangement Each ball is attached with two wires to a support, arranged in a straight line Minimum Ball Diameter 15 mm Suspension Wire Length 120 mm Frame Dimensions Confirm with PSAW Laboratory Equipments Ball Mass and Material Grade Confirm exact specifications with the supplier Price and Availability Contact PSAW Laboratory Equipments How Does Newton’s Cradle Work?
Follow the motion from one end to the other
STAGE 01 Displace One Ball
Lift one end ball away from its resting position, giving it gravitational potential energy.
STAGE 02 Release and Collide
Release the ball so that it swings into the neighbouring stationary ball.
STAGE 03 Observe the Other End
In the familiar idealised demonstration, a ball at the opposite end swings outward after the collision.
The Physics Behind the Demonstration
Momentum, kinetic energy and collision behaviour
Conservation of Momentum
Momentum describes the motion of an object in terms of its mass and velocity. In a system with negligible external forces, total momentum is conserved during a collision.
p = mvEnergy Transfer
As the raised ball swings down, gravitational potential energy changes into kinetic energy. During collision, energy is transferred between the balls. Some energy is also dissipated as sound, heat and deformation.
Why Do Intermediate Balls Appear Nearly Stationary?
When balls have similar masses and the collisions are close to elastic, momentum and energy transfer through the touching balls can cause the ball at the opposite end to swing outward. Real apparatus may show small deviations from this ideal behaviour.
Educational Uses
Topics teachers can introduce using this apparatus
- Demonstrating momentum transfer in collisions.
- Introducing kinetic and potential energy.
- Observing the behaviour of a series of suspended balls.
- Discussing elastic and inelastic collision models.
- Supporting practical explanations of basic mechanics.
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Newton’s Cradle: Frequently Asked Questions
Answers for teachers, students and laboratory buyers
What is Newton’s Cradle used for?
Newton’s Cradle is used to demonstrate collisions, momentum transfer and energy transfer between suspended balls in physics education.
How many steel balls are included in this model?
The specified model has five steel balls suspended in a straight line.
What is the minimum ball diameter?
The supplied product specification states a minimum ball diameter of 15 mm.
What is the suspension wire length?
The specified suspension wire length is 120 mm. Confirm how this measurement is defined on the supplier's exact model if precise dimensions are required.
Why does the ball at the opposite end move?
In the idealised demonstration, momentum and energy transfer through the aligned balls cause the ball at the opposite end to swing outward. Real-world friction and imperfect collisions affect the motion.
Is Newton’s Cradle a perfect example of energy conservation?
It illustrates energy transfer and approximate conservation in a collision system. The apparatus is not perfectly isolated, so sound, friction and other losses gradually reduce its motion.
How can I enquire about Newton’s Cradle price?
Contact PSAW Laboratory Equipments to confirm current pricing, availability, exact dimensions and ordering details.
Enquire About Newton’s Cradle
Looking for a five-ball Newton’s Cradle for a school, college or educational physics laboratory? Contact PSAW Laboratory Equipments for product details, pricing and availability.
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Newtons Cradle – Five Steel Ball Pendulum
Newton’s Cradle, also known as Newton’s Pendulum, is a physics demonstration apparatus featuring five steel balls suspended in a straight line by pairs of wires. When a ball at one extreme is lifted and released, the impact is transmitted through the intermediate balls, causing the ball at the opposite extreme to move. It is used to demonstrate collisions, momentum transfer and energy transfer in an educational setting. The specified model has a minimum ball diameter of 15 mm and suspension wires measuring 120 mm in length.