State the class of levers and the relative positions of load (L), effort (E) and fulcrum (F) in (a) a bottle opener, and (b0 sugar tongs.

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.

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

Describe the three classes of levers with diagrams representing the positions of the effort, load, and fulcrum in each case.

The class of lever in which the load is located between the fulcrum and the effort

The diagram alongside shows an arrangement of three pulleys A,B and C. the load is marked as L and the effort as E. (a) Name the pulleys A,B and C. (b) Mark in the diagram the directions of load (L), effort (E) and tension T_1 and T_(2) in the two strings. (c) How are the magnitudes of L and E related to the tension T_(1) ? (d) Calculate mechanical advantage and velocity ratio of the arrangement. (e) What assumptions have you made in parts (c) and (d) ?

Draw a simple diagram ofa fire tongs and mark on it the fulcrum F and the points of application of load L and effort E. (a) Name the class of lever. (b) if load arm is 15 cm and effort arm is 5 cm. what is its mechanical adavantage?

A block and tackle system has velocity ratio 3. draw a labelled diagram of the system indicating the points of application and the direction of load L and effort E. A man can exert a pull of 200 kgf. (a) What is the maximum load he can raise with this pulley system if its efficiency is 60% ? (b) if the effort end moves a distance 60 cm, what distance does the load move ?

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.

Classify the following into levers as class I, class II or class III: (a) a door (b) a catapult (c) claw hammer (d) a wheel barrow (e) a fishing rod. (f) sugar tongs.

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.