Put the relevant labels - load, fulcrum , and effort on each figure.

Load and effort

Label the load arm and effort arm in the figure.

Draw diagrams to illustrate the positions of fulcrum, load and effort, in each of the following : (a) A seesaw (b) A common balance (c) A nut cracker (d) Forceps.

Label the figure.

Identify the labelled parts A,B and C in given figure:

Indicate the positions of load L, effort E and fulcrum F in the forearm shown alongsind in figure. Name the class of leverl. .

You are given four pulleys and three strings. Draw a neat and labelled diagram to use them so as to obtain a maximum mechanical advantage equal to 8. In your diagram mark the directions of load L, effort E and tension in each strand. What assumptions have you made to Obtain the required mechanical advantage ?

A man uses a crowbar of length 1.5m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance of 1 m from his hand. (a) draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their direction. (b) state the kind of lever. (c) Calculate : (i) load arm, (ii) effort arm, (iii) mechanical advantage, and (iv) the effort needed.

Draw a diagram of a combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find : (i) the mechanical advantage, (ii) the velocity ratio, and (iii) the efficiency of the combination, in the ideal situation.

State the class of levers and the relative positions of load (L), effort (E) and fulcrum (F) in each of the following cases. (1) A bottle opener (2) Sugar tongs.