Some basic concept of Physics, about motion, SI units, frame of reference,

1. PHYSICS
BASIC CONCEPTS

2. Physical Quantities and Units
• Physical quantities
the feature of some thing which can be measured
• Numerical value
• Unit

3. Unit
• Importance of unit
50 waist slim or fat
• System International SI 1960
Basic units
Derived unit
Supplementary unit
Basic Unit
Derived Unit
Quantity Unit Symbol
Mass Kilogram Kg
Length Metre m
Time Second S
Electric
current
Ampere A
Temperature Kelvin K
Amount of
substance
Mole mol
Luminous
intensity
Candela cd
Quantity Unit /symbol
Velocity m/s
Acceleration m/ss
Force Kgm/ss (Newton)

4. Question to Audience
Light year is the unit of ??????
Distance

5. Scalar and vector Quantities
• Scalar quantities
Numerical values and unit
time, mass, temperature
• Vector quantities
Numerical value, unit and dimension
Acceleration, velocity, force

6. Question to audience
• Difference between
• Speed and velocity
• Mass and weight
• Distance and displacement

7. Kinematics
the features or properties of motion in an object
Rest and Motion w.r.t frame of reference
Motion
Describe in term of quantities position, velocity, acceleration
• Speed
• Velocity
• Acceleration

8. Two dimensional motion (Projectile motion )
Two dimensional motion
Body moves / covers vertical and horizontal distance

10. Force and motion (dynamics)
the branch which is concerned with the motion of bodies under the action of
forces
• Newton’s laws of motion
1) 1st law of motion (law of inertia)
2) 2nd law of motion (description of force)
3) 3rd law of motion

11. • How we can measure
INERTIA

12. Momentum
• Linear momentum
• Law of conservation of momentum
Initial momentum = final momentum
• Elastic and inelastic collision

13. Work and Energy
• Work
applied force x distance covered
Question to audience
Can we use displacement rather distance in Work formulae

14. Energy
• ability to do work
• Different forms of Energies
• Law of conservation of energy
Converted from one form to another
Energy Notes
Potential energy Due to position
Kinetic energy Due to motion
Solar energy Energy from solar
Chemical energy Due to chemical energy
Nuclear

15. Simple Harmonic Motion
to-and-fro motion
• Pendulum Mass attached to a spring

16. Static Charges

17. Nuclear Reaction
Fission Reaction
A big atom splits into small atoms.
• Nuclear reactor
• Disease
• Destruction purpose
Fusion Reaction
Small atoms combined to form a big atom
• Difficult to control
• A large amount of energy is required

18. Q & A