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SECTION "B"
(SHORT-ANSWER QUESTIONS) MARKS: 24
Note: Attempt any EIGHT (8) questions from this section.
Each question carries Three (3) Marks.
2. What do you mean by resolution of a vector? Also split the vector into its perpendicular components.
3. Define pressure. Write down two factors affecting pressure.
4. State and explain Hook's law.
5. Define density. Also write its formula and SI unit.
6. What is wind energy? Write down its two applications.
7. Write any three differences between scalar quantity and vector quantity.
8. A gun with a mass of 6 kg fires a bullet of mass 40 gram. Its velocity is 100 m/s. Calculate the recoil velocity of gun.
9. A cylinder contains 120cm3 of air at pressure of 140kPa. What will be its volume if the pressure on it is increased to 840kPa?
10. Calculate the power of a machine. If the machine performs 1800 Joules of work in 30 minutes.
11. A ball falls down from top of height of 90m. How much time the ball will take to reach the ground.
12. How much heat energy will be required to raise the temperature of 50g of water from 40°C to 70°C ? Where Specific heat of water is 4200 J/kg °C.
13. Fatima's weight is 900N on the Earth's surface. What will be her weight at the surface of moon?
SECTION "C"
(DESCRIPTIVE-ANSWER QUESTIONS) Marks: 24
Note: Attempt any FOUR (4) questions from this Section.
Each question carries Six (6) marks.
14. State Newton's law of gravitation. How can this law be used to derive the formula for calculating the mass of earth?
15. Define momentum and write its SI unit. State and prove law of conservation of momentum.
16. What do you mean by relative motion? Derive second equation of motion.
17. Which variables describe completely the behavior of a gas on the basis of kinetic molecular theory (KMT)? Explain any one of them.
18. Explain two types of equilibrium with examples on the basis of state of a body. Also write two conditions of equilibrium in detail.
19. Define the following:
(i) Specific Heat capacity
(ii) Latent heat of vaporization
(iii) Latent heat of fusion
Also write three benefits of high specific heat capacity of water.
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