Q.1.
A door knob is an example of which machine?
Q.2.
A _______ is a rope or chain wrapped around a wheel.
Q.3.
What is the equation for calculating work?
Q.4.
What are the units for work?
Q.5.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
Q.6.
An inclined plane wrapped around a rod forms this simple machine
Q.7.
It is defined as an activity done when a body or object moves with the application of external force is ________.
Q.8.
The pair of two elements are not held together in mechanically it is called -----------.
Q.9.
Which is an example of higher pair?
Q.10.
Which is an example of rolling pair?
Q.11.
Cylindrical Pair has a---- degree of freedom.
Q.12.
If the relative motion between them is completely or successfully constrained then the pair is known as -------
Q.13.
A---------- is again a combination of links connected to each other but no relative motion exists between them.
Q.14.
---------is a combination of rigid or restraining parts or bodies from which the machine is assembled.
Q.15.
The branch of theory of machines that deals with forces and their effects while the machine parts are at rest.
Q.16.
The branch of mechanics which deals with only motions and not with the forces
Q.17.
What 2 factors decrease population size?
Q.18.
A girl pushes a box across the floor. Did she do work?
Q.19.
Is work being done if I am trying to pick up a box but can not lift it?
Q.20.
AN block is liftedm. How much work was done?