ZIMSEC O Level Combined Science Notes: Machines: The inclined plane

  • Is also known as a ramp
  • is a flat supporting surface tilted at an angle,
  • with one end higher than the other,
  • used as an aid for raising or lowering a load
  • Inclined planes are widely used to move heavy loads over vertical obstacles
  • examples vary from a ramp used to load goods into a truck,
  • to a person walking up a flight of stairs
  • Moving an object up an inclined plane requires less force than lifting it straight up
  • at a cost of an increase in the distance moved i.e.
  • The load has to through an increased distance than would otherwise would
  • have moved vertically
  • As a result the load moves a greater distance
A flight of stairs is an example of an inclined plane

A flight of stairs is an example of an inclined plane

  • In an inclined plane the mechanical advantage is obtained using the formula:
  • \text{MA= }\dfrac{W}{F}
  • Where W is weight and F is force and MA stands for mechanical advantage
  • These are shown on the diagram above
  • Velocity ratio is obtained using the formula:
  • \text{VR= }\dfrac{d}{h}
  • Where h is the vertical distance of the inclined plane and
  • d is the distance moved by the load
  • θ is the angle of the plane
  • The smaller the angle of the inclined plane the smaller the effort required to move the load
  • The larger the distance the load must move

To access more topics go to the Combined Science Notes page

Quick NetOne, Telecel, Africom, And Econet Airtime Recharge

If anything goes wrong, click here to enter your query.