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
shows a nut cracker name the class of lever ?
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.
Define lever.
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.
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
Rowing of a boat
Draw a labelled sketch of a second class lever. Give one example of such a lever.
In the following diagram of a wheelbarrow, 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 the same class of lever.
A crowbar of length 100 cm is used to lift a load of 5 kgf. It has its fulcrum at a distance of 20 cm from the load. Calculate:
(i) the mechanical advantage of a crowbar and,
(ii) the effort applied at the other end.
What is a first-order lever?
