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.

A man uses a crowbar of length 1.5m to raise a load of 75 kgf by putti

1.	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.
Answer» Answer :(b) class I, (C) (i) 0.5 m (II) 1.0 m (III) 2 (iv) 37.5 kgf.