SAASTE Technology/Activities/Hydraulics

Systems & Control

Grade 8

Hydraulics
Syringes can be used to change the type & size of an input movement into a different output movement

ACTIVITY 1
Set up the investigation illustrated by the drawing above:


 * Use two 10-ml syringes with approximately 200 mm length of plastic tubing.
 * Use water in the system.
 * Use syringes A as the master cylinder.

1. Observe and write down what happens at syringe B: 2. Compare the distances

ACTIVITY 2
Repeat the investigation using a 60-ml syringe as the master and a 10-ml syringe as the slave.

2. Observe and note what happens.

3. Choose the correct options. If the plunger of the master syringe is pushed down 10 mm, the plunger of the slave will have moved:

A. 10 mm B. less than 10 mm C. more than 10 mm

Complete the system diagram below:

1. How is the input size changed?

2. How is the input type changed?

3. How would you describe the mechanical advantage that we get from a hydraulic system?

Author: Deon Kahn Editor: Osman Sadeck