Extension Springs – Pack of 10 (150 mm × 5 mm, ~8.7 N/m Spring Constant)

This Pack of 10 Extension Springs provides durable, high‑quality springs ideal for classroom investigations into forces, extension, and Hooke’s Law. Each spring measures 150 mm in length and 5 mm in diameter, offering consistent performance and reliable elasticity for repeated handling in school laboratories. With a typical spring constant of approximately 8.7 N/m, these springs are perfect for a wide range of physics demonstrations and student practicals.

Designed for clarity and ease of use, the springs can be attached to mass hangers, force meters, or stands, making them a versatile addition to physics equipment sets.

Key Features

• Pack of 10 extension springs
• Size: 150 mm length × 5 mm diameter
• Spring constant: ~8.7 N/m
• Strong, durable construction for repeated classroom use
• Ideal for force and extension investigations

Ideal for School Science Lessons

Perfect for KS3–KS5 physics, these springs support hands‑on learning in:

• Hooke’s Law experiments
• Measuring spring constant
• Investigating elastic and plastic deformation
• Exploring forces, energy storage, and simple harmonic motion

A reliable, classroom‑ready resource for individual, group, or demonstration work.