Question

1
Which of them helps to do the work faster? Why?
il. Identify the levers having the fulcrum in the middle
iii. Identify the levers having the effort in the middle
iv. Identify the levers having the load in the middle.
Sketch the labelled diagrams of the three types of lever.
Sketch the diagrams of a single movable pulley, a single fixed pulley and a
block and tackle of 3 pulleys.
b.
C.
Numerical Problems:
C.
A crowbar having the length of 1.75 m is used to balance a load of 500 N. If the
distance between the fulcrum and the load is 0.5 m, calculate: (Friction is neglected]
i.
effort applied to balance the load ii. MA iii. VR iv. efficiency
b.
A load of 400 N is lifted by a first class liver in which the load is at the
distance of 20 cm and the effort is at the distance of 60 cm from the
fulcrum. If 150 N effort is required to lift the load, what is its efficiency?
In a lever, a load of 600 N is lifted by using 400 N effort. If the load is at the
distance of 20 cm and the effort at the distance of 40 cm from the fulcrum.
calculate its efficiency.
Study the given diagram and calculate the following:
i. work done by load
ii. work done by effort
iii. M.A
iv. V.R.
15 cm​

Answer 1

Answer:

crowbar is best please mark brainlist

Answer 2

Answer:

1.iii) ldentifyingthe leaves having the effort in the middle