Circle the odd one :
Work done, Force `xx` Effort, Load `xx`Load arm, Effort `xx` Effort arm

Work done per unit time

Load and effort

Label the load arm and effort arm in the figure.

Draw a diagram of a block and tackle system of pulleys having a velocity ratio of 5. in your diagram indicate clearly the points of application and the directions of the load L and effort E. also mark the tension T in each strand.

Prove that Moment of couple= Force times couple arm

In a class three lever, the distance between the effort and the load is 40 cm and load arm is 1 m long. Find the length of the effort arm and then calculate MA.

1. In the figure given above, what do A and B represent? 2. What are the distances x and y called? 3. For levers, it can be shown that "Load"/"Effort"= "Length of effort arm"/" Effort Length of load arm" Using this information, state the value of the ratio, load/effort, for the figure shown above.

In a class two lever, the load arm is 80 cm long and the distance between the load and the effort is 120 cm. Find the MA.

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.