Making Work Easier - Class 8 Science Revision Notes

• Inclined planes.
• Single fixed pulley.

Inclined Planes.

These are tools that make work easier by increasing the effort distance.

Examples of inclined planes.

• Screw
• Screw driver.
• A road winding up a hill.
• Ladder.
• Staircase, escalators, ramps.
• Wedge

Single Fixed Pulley.

These are simple tools that make work easier by changing the direction of the force.
They are used to lift or raise load on higher surfaces.

A rope or string is put along the groove. The groove prevents the rope from slipping off.

Properties of a single fixed pulley.

• Makes work easier by changing the direction of the force.
• The effort distance and the load distance are equal.
• The effort force and load force move in opposite direction.
• The effort force and load force are equal

Uses of pulleys

1. Hoisting the flag.
2. To load or offload cargo at the ports.
3. Used in cranes