1. what: is inertia Define and explain the three
different type of interia.
2. Explain newton first law at motion whey do
we call at as the law of Interia ?
3. what do you understand by
resultant force & Explain with an example
4. passenger tend to fall backward when
bas Suddenly stant. Explain on the basis of Newton first low of motion
What is momentum & write us S.I unit Draw the
following graphs
a. Momenten versus velocity when mass is kept
Contast.
Momentum versus mass when Velicity is contast
Answers
- There are three types of inertia:
- There are three types of inertia:1. inertia of rest: this is the resistance offered by the body to remain in rest unless an external force is not applied on the body. eg.:if a carpet is beaten with a stick then the dust particles due to inertia of rest tends to remain in rest while the fibers of carpet becomes in motion.
- There are three types of inertia:1. inertia of rest: this is the resistance offered by the body to remain in rest unless an external force is not applied on the body. eg.:if a carpet is beaten with a stick then the dust particles due to inertia of rest tends to remain in rest while the fibers of carpet becomes in motion.2. inertia of direction: this is the resistance offered by the body to change its direction unless an ext.force is not applied on the body.Eg:if a bus tkes a turn then passengers sitting in tends to remain in the same direction in which the bus was travelling before.
- There are three types of inertia:1. inertia of rest: this is the resistance offered by the body to remain in rest unless an external force is not applied on the body. eg.:if a carpet is beaten with a stick then the dust particles due to inertia of rest tends to remain in rest while the fibers of carpet becomes in motion.2. inertia of direction: this is the resistance offered by the body to change its direction unless an ext.force is not applied on the body.Eg:if a bus tkes a turn then passengers sitting in tends to remain in the same direction in which the bus was travelling before.3. inertia of motion: the resistance offerd by the body to change its uniform motion.Eg:if a bus stops suddenly then the passengers fall forward due to inertia of motion
Newton's First Law
Newton's First LawNewton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion. Any change in motion involves an acceleration, and then Newton's Second Law applies. The First Law could be viewed as just a special case of the Second Law for which the net external force is zero, but that carries some presumptions about the frame of reference in which the motion is being viewed. The statements of both the Second Law and the First Law here are presuming that the measurements are being made in a reference frame which is not itself accelerating. Such a frame is often referred to as an "inertial frame". The statement of these laws must be generalized if you are dealing with a rotating reference frame or any frame which is accelerating.
Newton's First LawNewton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion. Any change in motion involves an acceleration, and then Newton's Second Law applies. The First Law could be viewed as just a special case of the Second Law for which the net external force is zero, but that carries some presumptions about the frame of reference in which the motion is being viewed. The statements of both the Second Law and the First Law here are presuming that the measurements are being made in a reference frame which is not itself accelerating. Such a frame is often referred to as an "inertial frame". The statement of these laws must be generalized if you are dealing with a rotating reference frame or any frame which is accelerating.Newton's First Law contains implications about the fundamental symmetry of the universe in that a state of motion in a straight line must be just as "natural" as being at rest. If an object is at rest in one frame of reference, it will appear to be moving in a straight line to an observer in a reference frame which is moving by the object. There is no way to say which reference frame is "special", so all constant velocity reference frames must be equivalent.
When there is more than one force acting upon the same body. The different forces is altogether replaced by a single force. This force is called resultant force.
The formula of resultant force is F∨R = F∨1 + F∨2 + F∨3
If the force F∨2 is perpendicular to the force F∨1 then the formula is
F∨R = F∨1 + F∨3 - F∨2
EXAMPLE --
If three forces 60N , 45N and 30N are acting on a body simultaneously. 30N is opposite to the direction of other two. Calculate the resultant force.
SOLUTION --
As per the formula we will place the quantities.
(60N + 45N) - 30N
105N - 30N
= 75N