# Physics

## Q1:     What is the value of large “G”?

6.67×10-11Nm/kg2

Q2:    What is the value of small “G“?

9.8m/s2

Q3:    what is the unit of work?

joul

Q4:    What is joul?

Unit of work

Q5:    1m =100cm

1kg =1000grams

Q6:    Define Displacement?

(The shortest distance b/w any two point)

Q7:    Difference b/w speed and velocity?

Distance couered in unite time is speed (scalar)

The rate of change of displacement is velocity (vector)

Q8:    Define scalar and vector quantities describe by magnitude only is scalar?

eg: 2kg sugar

Quantities describe by magnitude and direction is vector e.g weight force

Q9:    What is charge on proton?

(Positive charge)

Q10:    What is mass of proton?

1.6726219×10-27kg

Q11:    What is value of 1 radian

570

Q12:    If the two same body fall to the ground the which body will reach to the ground first?

(Large body will reach the ground first)

Q13:    1st Law of motion:

“Newton’s laws of motion Newton’s laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body”

Source: 1st Law of motion – https://en.wikipedia.org

In the absence of any external force a body in rest will remain in rest and a body in motion will remain in motion with uniform speed

Q14:    2nd Law of motion:

Continue it motion also when a net force is applied on a body it produces acceleration in that body which is directly proportional to applied force and inversely proportional to mass of the body.

Q15:    3rd Low of motion:

To every action there is rteactions which are equal in magnitude but opposite in directin)

Q16.     Define torgue?

(The turning effect of body is called torque)

Q17:    Momentum

The product of mass ad velocity is called momentum)

Q18:     what is diddrent between mass & weight?

Q19:    what is Nano second?

Small unit of time(10-9 sec)

Q20:    Define ” distance” & Nit?

The length of actual path is distance, unit is matere)

Q21:    Tell the name of Nobel gases?

Helim neon argon krypton, xenon rn

Q22:    What is ampher?

The unit of current.

Q23:    What current?

Flow of charges is called current.

Q24:    What is mass?

Done

Q25:    Acceleration?

The note of change of velocity is called acceleration.

W = mg

Equation of weight

Q27:    Center of gravity?

The point at which the whole weight of. A body acts is called center of gravity.

Q28:    What is atom?

Smallest particle of matter is called atom.

Q29:    What is macules?

The combination of two or more atoms is called molecule e.g. H2, H2O etc.