General physics formulas

some useful information formulas of physics:

equation of motion:

(v=final velocity, u=initial velocity, t=time, ±f=acceleration /retardation).

1. V=u±ft.

2. V^2=u^2±2fs.

3. S=ut±½at^2.

equation of motion of a body under gravity:

1. V=u±gt.

2. V^2=u^2±2gs.

3. H=ut±½gt^2.

equation of motion for a freely falling body:

(u=0)

1. V=gt.

2. V^2=2gh.

3. S=½gt^2.

* maximum height reached by the body thrown up,

h=u^2/2g.

* time of ascent =u/g.

* time of decent =u/g.

* time of flight =2u/g.

this formulas is most important for competitive exam:(rrb,sail,bhel,ntpc,iocl,ofb,psc,ssc).

General Physics -for competitive exams

some important question answer on physics:

1. The pressure exerted on the ground by a man greatest - When he stands on the toes of the foot.

2. A man with a dark skin, in comparison with a man with a white skin, will experience - Less heat and less cold.

3. One can distinguish a telescope from microscope by observing - Size of the lens.

4. In an atomic explosion enormous energy is released which is due to the - Conversion of mass in a energy.

5. How can boiling point of a liquid be reduced?

ans: By decreasing the pressure of the liquid.

6. Optical fibre are mainly used for- Communication.

7. The dark line in the solar spectrum are due to.

ans: Absorption of corresponding wavelength by the outer layers of the sun.

8. In an atomic nucleus, which cannot be read easily, can be read by- Exchange forces.

9. Mho is the unit of - Conductivity.

10. Nuclear fission is caused by the impact of - Neutron.

General Physics Information

some important unit of physics

1. 1Fermi=10^-15m.

2. 1 Angstrom =10^-10.

3. 1 Micron=10^-6.

4. 1 Light Year =9.46*10^12 km(approx.)

5. 1 Astronomical Unit(1AU)=1.496*10^8 km(approx.)

6. 1 Persec(largest unit of distance)=3.26 light year.

7. Velocity of Light =3*10^8 m/sec.