Page 39 - Science Class 6 Times Publication
P. 39
4. Inclined plane
A slanted surface over which load can be pulled or pushed is called
inclined plane. In general, it is a sloping surface. Winding roads on
hills, spiral staircase, wooden plank used for loading goods in a truck,
ramp used in hospitals, etc are some examples of inclined plane.
Wooden plank rested against truck Inclined Plane
5. Screw
A screw is a simple machine which seems to have an inclined plane
wrapped around a cylindrical surface. Jack screw, screw nail, driller,
etc are the examples of screw. A jack screw is used to lift vehicles
while changing their wheels.
Screw nail Driller Jack screw
6. Wedge
A wedge is a simple machine which has a
sharp part at one end and at part at the
other. The effort is generally applied upon
the at part and the sharp part performs
the work. A wedge is used to split the
wooden logs. Axe, knife, khukuri, nail,
chisel, needle, etc are also the examples
of wedge.
Times' Crucial Science and Environment 35 Book 6
