A crow bar has a length of 130 cm. A load of 50 kgf is placed at one end, which is 30 cm away from the fulcrum. Calculate the effort required.
130 N
145 N
150 N
115 N
120 N
A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the effort arm and the mechanical advantage of the crowbar.
The lever for which the mechanical advantage is less than 1 has the :
(a) fulcrum at the midpoint between the load and effort.
(b) load between the effort and fulcrum.
(c) the effort between the fulcrum and load.
(d) load and effort acting at the same point.