Advertisements
Advertisements
Question
Give three examples for leavers of 1st order.
Advertisements
Solution
Levers of 1st order:
(i) Railway signal
(ii) Handle of water pump
(iii) Motor car foot brake
(iv) Nail cutter
RELATED QUESTIONS
Which class of lever will always have MA > 1 and why?
Write down a relation expressing the mechanical advantage of a lever.
The lever for which the mechanical advantage is less than 1 has :
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand.
- Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions.
- State the kind of lever.
- Calculate:
- load arm,
- effort arm,
- mechanical advantage and
- the effort needed.
Which type of levers have mechanical advantage always more than 1? Give reasons.
Give three examples for leavers of the third order.
Which class of lever found in the human body is being used by a boy when he holds a load on the palm of his hand.
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
When we want to use a machine as a force multiplier, which class of lever should we preferably use? Give a simple diagram of such a lever.
State the types (or kinds) of lever, and give two examples of each kind.
