Very Important questions from previous question papers of Applied Physics 1

Short answer questions :

Q1.  It is easier to pull than to push a lawn roller. Why?
Q2.  What is difference between scalar and vector quantities ?
Q3. What is difference between heat and temperature ?
Q4. State triangle Law and parallelogram Law of Forces with diagrams.
Q5. Define Young's modulus(Y) and bulk modulus(K)  and modulus of rigidity of elasticity (n). Give mathematical expression of it and S.I. units.
Q6. Small drops of mercury are spherical. Explain why ?
Q7. Define viscosity, coefficient of viscosity? Write their relation and units?
Q8. State and explain Stoke's law.
Q9. What is Power? Give its relation with work, also write the S.I. and CGS units of Power.
Q10. Friction is necessary evil. Explain why?
Q11. Explain the laws of friction?
Q12. State and prove principle of Homogeneity of Dimensions with example.
Q13. Explain stress Strain Curve. 

Q14. Explain the modes of  transfer of heat. 

Long answer questions :

Q1. What do you mean by banking of tracks or roads ? Derive an expression for the banking angle.
Q2.  Explain the principle of conservation of energy. Show that for a freely falling body, total mechanical energy remains constant.
Q3. Derive expressions for (i) potential energy and (ii) kinetic energy.

Q4. State and prove principle of conservation of linear momentum.
Q5. Derive the relation between coefficient of linear expansion, coefficient of superficial expansion and coefficient of cubical expansion.
Q6. Define work. Write its units. Explain the types of work with examples.
Q7. What is linear expansion. Derive the relation of coefficient of linear expansion. 

Q8. What is volume expansion. Derive the relation of coefficient of volume expansion. 

Q9. What is dot product. Explain its properties. 

Q10. What is cross product. Explain its properties. 

Some important numericals : 

Q1. Convert the value of joule into ergs using dimensional equations.
Q2.  Convert the value of one newton into dyne using dimensional equations.
Q3. Convert the value of velocity of 72 km/hr into m/s using dimensional equations.
Q4.Check the accuracy of the relations v = u + at , E = mgh + 1/2 mv2
Q5. A man whose mass is 75 kg walks up 10 steps each 0.2 seconds, find the power he develops.
Q6. An electric motor lifts an elevator and its load of 1500 kg height of 20 m in 20 second. What is the power of motor?
Q7. The temperature of a healthy person is 98.4°F. Find the temperature on:

(i) Celsius scale (ii) Kelvin scale.
Q8. At what temperature on the Fahrenheit scale will have the reading double of the reading on centigrade scale ?   Or
Find the temperature at which the reading given by Fahrenheit thermometer is double as given by centigrade thermometer.

Q9. A gun weight 10kg fires a bullet of 0.03 kg with a velocity of 330m/s. With what velocity does the gun recoil ?

Note : Also do related numericals from book.