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viva 2 first

Total questions: 64

Worksheet time: 32mins

Name
Class
Date
1.

Physical quantities requiring both magnitude and direction are called:

a)

Scalars

b)

Tensors

c)

Vectors

d)

Matrices

2.

Which of the following is an example of a vector quantity described in the manual?

a)

Temperature

b)

Mass

c)

Wind Velocity

d)

Time

3.

The vector sum of two or more vectors is known as the:

a)

Resultant

b)

Equilibrant

c)

Component

d)

Product

4.

In the parallelogram method, the resultant is represented by:

a)

The side adjacent to the angle

b)

The diagonal of the parallelogram

c)

The height of the parallelogram

d)

The intersection of sides

5.

The 'Triangle Method' involves placing vectors:

a)

Head-to-tail

b)

Tail-to-tail

c)

Head-to-head

d)

Parallel to each other

6.

The force that balances the resultant force to bring a system to equilibrium is the:

a)

Resultant

b)

Equilibrant

c)

Normal force

d)

Friction

7.

If Vector A = 20N and Vector B = 20N are at 180° to each other, the resultant is:

a)

40N

b)

20N

c)

0N

d)

10N

8.

On a force table, the ring remains centered when the net force is:

a)

Maximum

b)

Zero

c)

Equal to one weight

d)

Infinite

9.

To improve the accuracy of the vector table experiment, one should:

a)

Use old strings

b)

Tap the pulley to minimize friction

c)

Use different sized pulleys

d)

Ignore the angles

10.

The unit of Force used in this experiment is:

a)

Kg

b)

Newton

c)

Joule

d)

Watt

11.

Which law is used to calculate the resultant vector mathematically?

a)

Ohm's Law

b)

Law of Cosines

c)

Boyle's Law

d)

Hooke's Law

12.

The 'Equilibrant' vector has the _____ magnitude and _____ direction as the Resultant.

a)

Same; Same

b)

Same; Opposite

c)

Different; Same

d)

Different; Opposite

13.

When adding vectors graphically, the length of the arrow represents:

a)

Magnitude

b)

Direction

c)

Uncertainty

d)

Time

14.

If three forces act on a ring and it does not move, the system is in:

a)

Rotation

b)

Acceleration

c)

Equilibrium

d)

Free fall

15.

Errors in this experiment are most likely caused by:

a)

Friction in pulleys

b)

Gravity changes

c)

Air density

d)

Magnetic fields

16.

A scalar quantity has:

a)

Only magnitude

b)

Only direction

c)

Both

d)

Neither

17.

Which trigonometric function is used to find the vertical component of a vector?

a)

Sine

b)

Cosine

c)

Tangent

d)

Secant

18.

If the angle between two equal vectors decreases, the magnitude of their resultant:

a)

Increases

b)

Decreases

c)

Stays constant

d)

Becomes zero

19.

Mass is converted to Weight (Force) by multiplying by:

a)
b)

(gravity)

c)

(height)

d)

(time)

20.

The graphical method requires:

a)

A calculator

b)

A ruler and protractor

c)

A stopwatch

d)

A thermometer

21.

A quantity that describes both magnitude and direction is a (a)   quantity.

22.

The equilibrant force is in the same direction as the resultant force.

a)

True

b)

False

23.

In the head-to-tail method, the resultant is drawn from the (a)   of the first vector to the head of the last vector.

24.

Tapping the table helps eliminate static friction in the pulleys.

a)

True

b)

False

25.

The condition where is called (a)   .

26.

Wind velocity is a scalar quantity.

a)

True

b)

False

27.

The law of (a)   is useful for adding two vectors analytically.

28.

Increasing the mass on the pulleys changes the angle required for equilibrium.

a)

True

b)

False

29.

Mass is a (a)   quantity.

30.

The diagram shape formed when adding more than two vectors is a (a)   .

31.

When a solid reaches its melting point, additional heat causes:

a)

Temperature rise

b)

Phase change without temperature change

c)

Temperature drop

d)

Expansion only

32.

The heat required to melt a solid depends on its mass and:

a)

Volume

b)

Density

c)

Specific latent heat of fusion ()

d)

Boiling point

33.

Specific heat capacity () is relevant when:

a)

Phase changes

b)

Temperature changes

c)

Mass changes

d)

Pressure changes

34.

To ensure accurate measurement, ice cubes must be:

a)

Crushed

b)

Dried

c)

Melted

d)

Cubed

35.

The SI unit for Specific Latent Heat is:

a)

J/kg

b)

J/kg°C

c)

J

d)

W

36.

Thermal equilibrium occurs when:

a)

Heat flows from hot to cold

b)

Two objects reach the same temperature

c)

Phase change stops

d)

Power is turned off

37.

If water is on the surface of the ice before adding it to the calorimeter, the calculated will be:

a)

Lower than actual

b)

Higher than actual

c)

Unchanged

d)

Infinite

38.

The specific heat capacity of water is approximately:

a)

J/kg°C

b)

J/kg°C

c)

J/kg°C

d)

J/kg°C

39.

The heat gained by the ice equals:

a)

Heat lost by water only

b)

Heat lost by water + Heat lost by calorimeter

c)

Power supplied

d)

Zero

40.

Stirring the mixture ensures:

a)

Faster melting

b)

Uniform temperature distribution

c)

Increased friction

d)

Aeration

41.

Which variable is NOT needed to calculate of ice?

a)

Mass of ice

b)

Initial water temp

c)

Atmospheric pressure

d)

Final mixture temp

42.

Latent heat of fusion refers to the transition from:

a)

Solid to Liquid

b)

Liquid to Gas

c)

Solid to Gas

d)

Liquid to Solid

43.

If the final temperature is lower than room temperature, heat is:

a)

Lost to surroundings

b)

Gained from surroundings

c)

Conserved completely

d)

Zero

44.

The symbol for specific heat capacity is:

a)
c
b)
h
c)
k
d)
m
45.

Electrical energy is calculated as:

a)
E = I × R
b)
E = V × Q
c)
E = F × d
d)
E = P × t
46.

A mixture of ice and water at equilibrium is at:

a)
-10 degrees Celsius
b)
0 degrees Celsius
c)
25 degrees Celsius
d)
100 degrees Celsius
47.

Why is a polystyrene cup often used?

a)

Transparency

b)

Good insulation

c)

High conductivity

d)

Strength

48.

The total heat required to melt ice and warm the water is:

a)
Q_total = m * L_f + m * g * ΔT
b)
Q_total = m * c * T_f
c)
Q_total = m * L_f + m * c * ΔT
d)
Q_total = m * L_f + m * c * T_i
49.

The rotation of the axis of a spinning object due to torque is called:

a)

Rotation

b)

Precession

c)

Translation

d)

Vibration

50.

A gyroscope measures:

a)

Linear velocity

b)

Angular orientation/velocity

c)

Temperature

d)

Mass

51.

The moment of inertia () relates torque () and:

a)

Velocity

b)

Angular acceleration ()

c)

Mass

d)

Gravity

52.

Nutation is:

a)

Smooth rotation

b)

A slight wobbling/nodding of the axis

c)

Linear motion

d)

A complete stop

53.

The period of precession depends on:

a)

Temperature

b)

Torque and Angular Momentum

c)

Air resistance

d)

Color of disk

54.

If the spin speed of the gyroscope increases, the precession rate:

a)

Increases

b)

Decreases

c)

Stays same

d)

Reverses

55.

The relationship between torque () and change in angular momentum () is:

a)
τ = m * a
b)
τ = F * r
c)
τ = dL/dt
d)
τ = I * α
56.

Torque is calculated as:

a)

Force Distance ()

b)

Force / Distance

c)

Mass Velocity

d)

Energy / Time

57.

The unit of Moment of Inertia is:

a)
kg·m²
b)
g·m²
c)
kg·s²
d)
kg·m
58.

If weight is added to the end of the gyroscope axle, the torque:

a)

Increases

b)

Decreases

c)

Stays zero

d)

Becomes negative

59.

Gyro-frequency refers to:

a)

Precession speed

b)

Spin speed of the disk

c)

Nutation speed

d)

Pendulum swing

60.

To determine Moment of Inertia experimentally, one can measure:

a)

Voltage

b)

Angular acceleration

c)

Density

d)

Volume

61.

The direction of precession can be determined by:

a)

The Right-Hand Rule

b)

The Left-Hand Rule

c)

Hooke's Law

d)

Bernoulli's Principle

62.

When the external torque is zero, the angular momentum is:

a)

Conserved

b)

Increasing

c)

Decreasing

d)

Zero

63.

A 'Free Axis' in a gyroscope allows:

a)

No motion

b)

Rotation

c)

Friction

d)

Heating

64.

Precession frequency is usually _____ than the spin frequency.

a)

Much lower

b)

Much higher

c)

Equal

d)

Unrelated