SS 2 Third Term Examination PHYSICS

CLASS: S S 2

SUBJECT: PHYSICS

Which of the following is not a vector quantities? (a) Speed (b) force

©Velocity (d) Acceleration.

Which of the following is not a scalar quantity? (a)Density (b) speed

(c) Temperature (d) weight

Two force, whose resultant is 100N, are perpendicular to each other. If one them makes me an angle of 60⁰ with the resultant, calculate its imagination

Calculate its magnitude.

(Sin 60⁰ =0.8660, cos 60⁰= 0.5000)

1. 200.0 N (b) 173.2N (c)115.5N (d) 86.6N
   1. Find by drawing and by calculating the resultant of two vector 3units and 4units inclined to each other at (a) 30⁰ (b) 90⁰ (c) 120⁰ (d)75⁰
   2. Resolve a force of 100N inclined at 50⁰ to the horizontal, calculate the horizontal components.
2. 62.28N (b) 60.28N (c) 70.00N (d) 28.60N
   1. A body starts from rest and moves with constant acceleration. Which of the following quantities varies / vary linearly with the square of the line?
3. I = velocity, II = Displacement, (III) momentum
4. I only (b) II only (c) I and II only (d) III only
   1. A body which is uniformly retarded comes to rest in 10s after traveling a distance of 20m calculate its initial velocity:
5. 0.5m5^-1 (b) 2.0m5^-1 (c) 20.0m5^-1 (d) 200.0m5^-1
   1. A mango fruit drops to the ground from the top of its tree which is 5m high. How long does it take to reach the ground/
6. 1.05 (b) 2.05 (c) 3.05 (d) 0.55
   1. Calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30m5^-1
   2. Calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30m5^-1
   3. ……………………………. Is the time required for a projectile to return to the same level from which it was projected?
7. Maximum height (b) time of flight (c) Range (d) None of the above
   1. The formula for range is …………………………………..
8. R= u² sin 2 0 (b) R = u² sin2 0 (c) R = 2u sin 0 (d) R = 1\2gT²

g 2g g

• 1. A ball is projected horizontally from the top of a hill with a velocity of 30m5-1. If it reaches the ground 5 seconds letter. The height of the hill is

(a) 20m (b) 125m (c) 250m (d) 65m

• 1. ……………………… is the highest vertical distance attained as measured from the horizontal projection plane? (a) Time of flight (b) maximum height

© range (d) time of motion

• 1. ……………………………. Is single force which acting alone will have the same effect in magnitude and direction as two or more forces acting together?

1. Resultant (b) force (c) moment (d) opposition
   1. The 5.1 unit of the moment of a force is ;
2. Kgm (b) Nm (c) Nm^-1 (d) Jm
   1. ………………………………. Is the body is either not rotating at all or in rotating at a constant angular velocity.
3. Equilibrium (b) Dynamic (c) Rotation (d)resultant
   1. A uniform meter rule balances on a knife edges at 55cm mark when a mass of 40g is hung from 95cm mark find the weight of the ruler.
4. 32kg (b) 0.32kg (c0 45kg (d) 5kg
   1. ………………………. Is the velocity decrease by equal amount in equal times
5. Uniform velocity (b) acceleration (c) uniform acceleration (d) speed

20. ____________ is the heat supplied or remove which causes a change of style without a change in temperature (a) Latent heat (b) Vaporization (c) Heat of fusion (d) specific heat

21. _____________ is a process where a liquid turn spontaneously into vapour below its boiling point

22.A stationery bell is hit by an average force 50N for a time of 0,03 sec. what is the impulse experienced by the body ?

(a) 15N/s (b)m1.5N/s (c) 1.25 N/s (d) 2.5N /s

224. A meter rule is pivoted at its midpoint C with a verticel force of 10N hanging from the distance 30cm from C . at what distance must a 15N force hang to balance the ruler horizontally?

(a) 30cm (b) 2.0cm (c) 20cm (d) 25cm

25.For a projectile the maximum range is obtained when the angle of projection is _____

(a)60⁰ (b) 30⁰ (c) 45⁰ (d) 75⁰

26. A ball is released from a height above the ground. find its velocity after 5 seconds take g as 10m5^-2

(a)20m (b) 5m (c) 50cm (d)60m

27. The derived unit of pressure can be expressed as

(a) kgm^-15^-1 (b) kgm5² (c) kgm^-25^-2 (d)kgm^-15^-2

28. Which of the following devices is used to determine the relative intensive of an acid

(a) manometer (b) hydrometer (c) hypsometer (d) hygrometer

29. Which of the following substances is the most volatile at room temperature?

(a)Water (b) diesel (c)petrol (d) kerosene

30. The movement of fluid up or down a narrow tube is _______

(a) Brownian motion (b) capillarity (c) diffusion (d) Osmosis

31. The 5/1 unit of heat is ______ (a) Joule (b) Kelvin (c) Watt (d) ampere

32. The tendency for stationery body to continue to remain at rest when a force is applied to

it is known as _____________ (a) Impulse (b) inertia (c) momentum (d) Friction

33. When a body is slightly tilted. it is found that its centre of gravity is slightly raised , what is the state of equilibrium of the body (a) Unstable (b) Neutral (c) cannot be determined

34. A balling through a viscous liquid is acted upon by

(a) up thrust only (b) up thrust and the ball’s weight (c) The ball’s weight and viscous force

(d)up thrust , the ball’s weight and viscous force

35. Alcohol of mass 21g and density 0.7gcm^-3 is mixed with log of water . determine the density of the mixture { Density of water = 1.0cm^-3} (a) 0.775gcm^-3 (b) 0.780gcm^-3 (c) 0.875gcm^-3

(d) 0.880gcm^-3

36. The s.1 unit of power is ____________ (a) N (b) pa (c) W (d) j

37. The device that converts mechanical energy into electrical energy is _________

(a) Dynamo (b) An electric motor (c) An induction coil (d) A transformer

38. Heat transfer by conduction is similar to wave motion because

(a) There is increase in temperature (b) Transfer of materials is involved

(c) Charges particles vibrate at right angle (d) No transfer of material is involved

39. An electric motors converts

(a) Electrical energy to mechanical energy (b) Mechanical energy to electrical energy

(c) mechanical energy to sound energy (d)Electrical energy to thermal energy

40. Which of the following units is derived (a) kg (b) M (c) K (d) N

41. Which of the following is not a vector quantity? (a) Speed (b) force

©Velocity (d) Acceleration.

1. Which of the following is not a scalar quantity? (a)Density (b) speed

(c) Temperature (d) weight

1. Two force, whose resultant is 100N, are perpendicular to each other. If one them makes me an angle of 60⁰ with the resultant, calculate its imagination

Calculate its magnitude.

(Sin 60⁰ =0.8660, cos 60⁰= 0.5000)

1. 200.0 N (b) 173.2N (c)115.5N (d) 86.6N
2. Find by drawing and by calculating the resultant of two vector 3units and 4units inclined to each other at (a) 30⁰ (b) 90⁰ (c) 120⁰ (d)75⁰
3. Resolve a force of 100N inclined at 50⁰ to the horizontal, calculate the horizontal components.
4. 62.28N (b) 60.28N (c) 70.00N (d) 28.60N
5. A body starts from rest and moves with constant acceleration. Which of the following quantities varies / vary linearly with the square of the line?
6. I = velocity, II = Displacement, (III) momentum
7. I only (b) II only (c) I and II only (d) III only
8. A body which is uniformly retarded comes to rest in 10s after traveling a distance of 20m calculate its initial velocity:
9. 0.5m5^-1 (b) 2.0m5^-1 (c) 20.0m5^-1 (d) 200.0m5^-1
10. A mango fruit drops to the ground from the top of its tree which is 5m high. How long does it take to reach the ground/
11. 1.05 (b) 2.05 (c) 3.05 (d) 0.55
12. Calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30m5^-1
13. Calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30m5^-1
14. ……………………………. Is the time required for a projectile to return to the same level from which it was projected?
15. Maximum height (b) time of flight (c) Range (d) None of the above
16. The formula for range is …………………………………..
17. R= u² sin 2 0 (b) R = u² sin2 0 (c) R = 2u sin 0 (d) R = 1\2gT²

g 2g g

1. A ball is projected horizontally from the top of a hill with a velocity of 30m5-1. If it reaches the ground 5 seconds letter. The height of the hill is

(a) 20m (b) 125m (c) 250m (d) 65m

1. ……………………… is the highest vertical distance attained as measured from the horizontal projection plane? (a) Time of flight (b) maximum height

© range (d) time of motion

1. ……………………………. Is single force which acting alone will have the same effect in magnitude and direction as two or more forces acting together?
2. Resultant (b) force (c) moment (d) opposition
3. The 5.1 unit of the moment of a force is ;
4. Kgm (b) Nm (c) Nm^-1 (d) Jm
5. ………………………………. Is the body is either not rotating at all or in rotating at a constant angular velocity.
6. Equilibrium (b) Dynamic (c) Rotation (d)resultant
7. A uniform meter rule balances on a knife edges at 55cm mark when a mass of 40g is hung from 95cm mark find the weight of the ruler.
8. 32kg (b) 0.32kg (c0 45kg (d) 5kg
9. ………………………. Is the velocity decrease by equal amount in equal times
10. Uniform velocity (b) acceleration (c) uniform acceleration (d) speed
11. ……………………………. Is the time required for a projectile to return to the same level from which it was projected?
12. Maximum height (b) time of flight (c) Range (d) None of the above

THEORY

1. Define latent heat of vapourization

2. Define specific heat capacity

3. What is moment

4. a body of mass 3.0kg moves with a velocity of 10ml5^-1

5. State the application of expansion

6. State three (3) heat transfer

THEORY

1 (A) Define vector quantities and scarlar quantities

(b) Give 3 examples of vector and scarlar quantities

2. State the law of parallelogram

3. Find by drawing and by calculation in the resultant of two vectors 3unit and 4units incline to each other

4. State the three equation of motion

5. A car accelerates uniformly at a rate of 10m5^-2 from an initial velocity of 36kmhr^-1 for 3 seconds find the distance covered during this period.

6. A body moving with a initial velocity of 30m5^-1 accelerates uniformly at a rate of 105m^-2 until it attains a velocity of 50m5^-1 . What is the distance covered during this period.

7. A projectile is fired with initial velocity of 100m\5^-1 at an angle of 30⁰ with the horizontal calculate (i) the time of flight

(ii) The maximum height attained

(iii) The range

8. Define the following (a) Time of flight

(b) Maximum height