What makes our work easier and faster?
Which class of lever is a nail cutter?
What is the position of the effort in a third-class lever?
Give an example of a wedge,
What is a screw ?
Answers
Answer:
A1.Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied. ... That's because a machine doesn't change the amount of work and work equals force times distance.
A2.This type of lever has the load positioned between the effort and the fulcrum. A Class 2 lever always magnifies the effort force because it is always positioned at the opposite end of the lever from the fulcrum. The bottle opener and nail clippers are example of a class 2 levers.
A3.In a third class lever, the effort is between the load and the fulcrum.
A4.shim is an example of wedge
A5.a short, slender, sharp-pointed metal pin with a raised helical thread running round it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place.