The document discusses fundamental concepts in Newtonian physics, specifically focusing on kinematics and dynamics. It covers Newton's laws of motion, the concept of inertia, momentum conservation, and impulse related to force application. Several examples and calculations related to motion and forces are also provided to illustrate these principles.

1. C L A S S 11 T H
PHYSICS
DATE – 18 JULY 2023
Lecture 1

2. Newtonian Physics
KINEMATICS:-
V = u + at
S = ut +
1
2
at2
V2= u2+2as
Cause ??
(Rest and Motion)

3. Dynamics
Cause ??
Force

4. Types of Force

5. Newtons laws of motion
1st law
Law of inertia:-
Inertia:- Inertia is an inherent property of a body that opposes in a condition of motion.
Its depend on mass.
Types of inertia
1. Inertia of rest
2. Inertia of direction
3. Inertia of motion

6. Law -
A body at rest will remain at rest, and a body in motion will keep moving in the same
direction unless an external force is applied to it.

7. External Force & internal force

8. Momentum
Momentum is characteristic of a body in motion that does not change and remains always conserved.
P =
Unit –
Dimension:-

9. • If m1= 5 kg
v1=36 km/h
m2= 2 kg
if the velocity of m2 after the incident is equal to 18km/h then find out the velocity of m1

10. Q- A 40 kg shell is flying at a speed of 72 kg/h. it explodes into 2 pieces of mass, 15 kg
stopes then calculate the velocity of the other piece.

11. 2nd law of motion
The rate of change of momentum is directly proportional to the applied force.
It define the quantity of force.

12. Impulse
A large force is applied for a small time to create an impulse.

13. Q- A cricket ball mass of 150 g moving with a velocity of 12m/s hit by a bat and turn back
with a velocity of 20m/s duration of the contact is 0.01 sec. find impulse and average force
by the ball on the bat?