Mechanics System 1 – code: 4861.19

Mechanics System 1

Code: 4861.19

An introductory system to study basic mechanics

Our high quality Mechanics System 1 comes in a heavy duty carry-case for ease of storage.

Simple to set-up with all components easily accessible. The system consists of: balance, inclined plane, friction block, weights, simple machines, pulleys, levers, springs and scales. A variety of experiments can be carried out using this kit.

Size: 50x45x15 cm
Weight: 7.4 kg
Track Lenght: 60 cm
Weight: 1.2 kg
Packing: external suitcase in aluminium, internal foam to prevent accidental breakage

Equipment Suggested
Electronic Balance (code 2219.30)
RED Force Sensor (code 4840.14)
Tripod Stand (code 4830.46)


  • Sectional universal base with 3 knobs
  • Pulley with hook
  • Plastic Pulley, with metal rod
  • Scale pan hooked, with metal suspension
  • Friction block
  • Tubular Spring Balance (Metal) 3N, 6N, 10N
  • Lever, Holed Rod, with pair of threaded cylinders
  • Double Side Scale, silk screen
  • Inclined plane, with 3 different track terminals
  • Spring leaves
  • Extension Clamp with Rod
  • Cart for Inclined Plane
  • Differential pulleys
  • Goniometric Circle
  • Tape Measure
  • Vernier caliper, scale 0÷160 mm, accuracy 0.05 mm
  • Cylindrical mass 10 g, 25 g, 50 g
  • Mass 1g, 2g, 5g, 10g, 20g, 50g, 100g
  • Flat mass 300 mg, 500 mg
  • Steel spring with pointer
  • Hook for Cart
  • Rod with clip
  • RED pointer with clip
  • Suspension ring
  • Axle with fixing screw for differential pulley
  • Metal bossheads
  • Bossheads
  • Mass hanger with slotted masses


  • Belt drive systems
  • Composition, decomposition and transmission of forces including the parallelogram law
  • Analytical balance and the investigation of weight as a force
  • Levers: including first, second and third class type
  • Pulley systems: including fixed, mobile and differential pulleies
  • Simple pendulum and spring pendulum
  • Hooke’s Law with spring and with spring leaf
  • Inclined plane and friction
  • Kinetic and potential energy
  • The concept of experimental error
  • Springs in series and in parallel

Many of these experiments will also be suitable for applied mathematics.


  • Balance oscillation measurements
  • Balance sensitivity
  • Belt wheel drive
  • Composition and decomposition of forces
  • Concurrent forces
  • Decomposition of a force into its components
  • Determination of the acceleration due to gravity by means of the simple pendulum
  • Elongation of a leaf spring
  • Elongation of a spring
  • First-class levers
  • Fixed pulley
  • Hooke’s Law
  • Inclined plane
  • Investigation of an oscillation of a simple pendulum
  • Measurement of length
  • Mobile and fixed pulley
  • Momentum of a force
  • Parallelogram of forces
  • Second and third-class levers
  • Static and dynamic friction
  • Spring pendulum
  • Springs in series and parallel
  • Static measurement of a force
  • The concept of kinetic energy
  • The concept of potential energy
  • Transmission of a force along a cable
  • Weight as a force
EXAMPLE OF USE: Analytical Balance

In-depth investigation of the analytical balance

The balance is an instrument that allows, in a gravitational field, to measure the unknown masses by comparison with sample masses. One sample experiment is the determination of the sensitivity of a balance which has arms of equal length. The more sensitive a balance is, the smaller the variation in a mass (m) the balance can detect and measure. If the test mass (m) is lesser in magnitude than the sensitivity of the balance, it will not be detected. With reference to the diagram, if load a test mass (M) on each pan of the balance and assuming that the distance between each of the pans is equidistant and represented by “a”, we can vary weight on one of the pans whic will result in a displacement through an angle defined by α.

4861.19 Formula defining balance sensitivity

Therefore, we can see that the sensitivity of a balance depends on several design characteristics as well as the patience of the experimenter. For example, the more stable the design of a balance, the more mass is needed to move the balance noticeably. Additionally, the more friction at the locations where movement is required, the less sensitive the balance will be.

4861.19 Schematic of analytical balance

Schematic of analytical balance