Physics Chapter: Moment of Force (Torque)
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Questions and Answers

What is the primary unit for measuring mass?

  • Kilograms (correct)
  • Grams
  • Pounds
  • Newtons

Weight is a scalar quantity.

False (B)

What device is used to measure small lengths accurately in mm?

Micrometer screw gauge

The formula to calculate weight is represented as $W = ______$

<p>mg</p> Signup and view all the answers

Match the instruments with what they measure:

<p>Vernier Caliper = Small lengths in cm Micrometer Screw Gauge = Small lengths in mm Electronic Balance = Mass in kg Spring Balance = Weight in N</p> Signup and view all the answers

What does the formula $T = F imes d$ represent?

<p>Moment of Force (B)</p> Signup and view all the answers

The moment of force is measured in Joules.

<p>False (B)</p> Signup and view all the answers

What must be increased to enhance the turning effect of a moment?

<p>weight or distance</p> Signup and view all the answers

A moment that tends to rotate an object in a counterclockwise direction is known as an ______.

<p>anticlockwise moment</p> Signup and view all the answers

Match the following terms with their descriptions:

<p>Clockwise Moment = Moment that rotates an object in a clockwise direction Anticlockwise Moment = Moment that rotates an object in a counterclockwise direction Force = The push or pull on an object Distance = The length from the pivot point to where the force is applied</p> Signup and view all the answers

What is the SI unit of volume?

<p>$m^{3}$ (C)</p> Signup and view all the answers

Which of the following is classified as kinetic energy?

<p>Sound energy (B)</p> Signup and view all the answers

Qualitative observation relies solely on numerical data.

<p>False (B)</p> Signup and view all the answers

A cube has a volume formula of $s imes s imes s$.

<p>True (A)</p> Signup and view all the answers

What does it mean to 'verify answer' in problem-solving?

<p>It means to check if the solution obtained is correct and makes sense in the context.</p> Signup and view all the answers

What SI unit is used to measure mass?

<p>kilogram</p> Signup and view all the answers

The volume of a cylinder is calculated using the formula __________.

<p>$ rac{4}{3} imes eta r^{2}h$</p> Signup and view all the answers

The base quantity of length is measured in ______.

<p>metres</p> Signup and view all the answers

Match the following SI units with their corresponding base quantities:

<p>metre = Length kilogram = Mass second = Time ampere = Electric current</p> Signup and view all the answers

Match the solid shapes with their respective volume formulas:

<p>Cube = $s^{3}$ Cuboid = $L imes W imes H$ Cylinder = $eta r^{2}h$ Sphere = $ rac{4}{3} eta r^{3}$</p> Signup and view all the answers

What is the formula for density in a substance?

<p>$ ho = rac{m}{V}$ (A)</p> Signup and view all the answers

The volume of water displaced can be found using the formula $V = V_1 - V_2$.

<p>False (B)</p> Signup and view all the answers

What is the correct general format for writing numbers in scientific notation?

<p>$a imes 10^{b}$ (B)</p> Signup and view all the answers

What is the relationship between mass (m), density ($ ho$), and volume (V)?

<p>m = $ ho imes V$</p> Signup and view all the answers

What does Hooke's Law state?

<p>The extension of a spring is directly proportional to the load applied. (A)</p> Signup and view all the answers

To compute the gradient of a graph, you use the formula $Gradient = \frac{}{}$.

<p>y_2 - y_1, x_2 - x_1</p> Signup and view all the answers

Speed is a vector quantity.

<p>False (B)</p> Signup and view all the answers

The formula for Hooke's Law is $F = kx$. If the force is doubled, the extension of the spring will also double.

<p>True (A)</p> Signup and view all the answers

Match the following units to their conversions:

<p>1 g/cm³ = 1000 kg/m³ 1 kg/m³ = 1000 g/cm³ 1 L = 1000 mL 1 m³ = 1000 L</p> Signup and view all the answers

What is the significance of the spring constant (k) in Hooke's Law?

<p>The spring constant (k) indicates the stiffness of the spring.</p> Signup and view all the answers

Define displacement in the context of physics.

<p>Displacement is the distance moved in a specific direction and represents the change in position.</p> Signup and view all the answers

The measure of magnitude of separation between two points is called ______.

<p>distance</p> Signup and view all the answers

The formula to calculate the spring constant is $k = rac{F}{______}$

<p>x</p> Signup and view all the answers

Match the concepts related to Hooke's Law with their definitions:

<p>F = Force applied to the spring k = Spring constant indicating stiffness x = Extension of the spring Elastic limit = Maximum load without permanent deformation</p> Signup and view all the answers

Which of the following statements is true about digital measuring instruments?

<p>They can be read directly off of a display. (B)</p> Signup and view all the answers

Linear scales have evenly spaced markings.

<p>True (A)</p> Signup and view all the answers

What is the process of setting or checking the graduations on a scale of a measuring instrument called?

<p>calibration</p> Signup and view all the answers

The __________ of a measuring instrument refers to how close an experimental value is to the true value.

<p>accuracy</p> Signup and view all the answers

Match the following measuring instrument characteristics with their definitions:

<p>Range = The size of the interval between the max and min value Sensitivity = Response to the smallest change in quantity Accuracy = Closeness of experimental value to true value Precision = The smallness of uncertainty in measurement</p> Signup and view all the answers

What is the derived unit for density?

<p>kg/m³ (D)</p> Signup and view all the answers

The prefix 'Mega' represents a value of 10^6.

<p>True (A)</p> Signup and view all the answers

What formula is used to calculate the area of a rectangle?

<p>Length × breadth</p> Signup and view all the answers

The prefix 'Kilo' corresponds to the value of __________ in scientific notation.

<p>10^3</p> Signup and view all the answers

Match the following prefixes with their corresponding values in scientific notation:

<p>Giga = 10^9 Centi = 10^-2 Milli = 10^-3 Micro = 10^-6</p> Signup and view all the answers

Flashcards

Moment of Force

The product of force and the distance from the pivot.

Moment Formula

Moment (T) = Force (F) × Distance (d)

Clockwise Moment

A moment that rotates in a clockwise direction.

Anticlockwise Moment

A moment that rotates in an anticlockwise direction.

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SI Unit of Moment

Newton Metres (Nm)

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Volume definition

The amount of space an object takes up.

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Volume SI unit

Cubic meters ($m^{3}$).

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Volume of a cube formula

side x side x side ($s^{3}$).

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Volume of a cuboid formula

Length x Width x Height (L x W x H).

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Solving problem step 1

Understand and visualize the problem.

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Volume of water displaced

Difference between initial and final water levels

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Density formula

Density equals mass divided by volume

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Density unit conversion

1 g/cm³ is equal to 1000 kg/m³

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Graph plotting rules

Steps to correctly plot a graph: label axes, chose scale, plot points, draw line.

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Gradient calculation

Gradient is (y2-y1)/(x2-x1). Use plotted points to find the steepness of the line on the graph.

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What is physics?

The study of matter, energy, and how they interact.

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Scientific Notation

A way to write very large or very small numbers using powers of 10.

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Kinetic Energy examples?

Light, mechanical, thermal, sound, and electric energy.

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Scalar Quantity

Has magnitude (size) but no direction.

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Potential Energy examples?

Nuclear, chemical, gravitational, and magnetic energy.

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Qualitative Observation?

Use senses to describe something.

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Vector Quantity

Has magnitude (size) and direction.

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Distance

Total length of the path traveled.

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SI Unit for Length?

Metre (m).

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Displacement

Straight-line distance between initial and final positions.

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Digital Scale

A scale that displays readings directly on a display, showing increments of a fixed minimum amount.

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Hooke's Law

The extension of a spring is directly proportional to the force applied, as long as the spring isn't stretched too far (elastic limit).

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Analog Scale

A scale that uses a moving indicator to represent a value.

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Spring Constant (k)

A measure of how stiff a spring is; a higher constant means a stiffer spring.

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Linear Scale

A scale with evenly spaced markings.

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Hooke's Law Formula

F = kx, where F is force, k is the spring constant, and x is the extension.

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Line of Best Fit

A line on a graph that best represents the relationship between two variables.

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Calibration

Checking a scale's accuracy by comparing it to a standard value.

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Scale Range

The difference between the maximum and minimum values a scale can measure.

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Finding the Line of Best Fit

Draw a line through the plot points and find the y-intercept of the line.

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What is mass?

Mass is the amount of matter in an object.

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What is weight?

Weight is the force of gravity on an object.

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SI unit of mass

Kilograms (kg).

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How to read a micrometer?

Read the main scale and add the thimble scale reading.

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How to read a Vernier caliper?

Read the main scale and add the vernier scale reading.

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Derived Quantity

A physical quantity defined in terms of fundamental quantities and given by a defining equation.

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Fundamental Quantity

A physical quantity that cannot be defined in terms of other quantities.

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SI Unit

Standard International unit for a measurable physical quantity.

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Prefix (Giga)

A prefix for a factor of 10^9 in scientific notation

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Study Notes

Moment of Force (Torque)

  • The product of the force and the distance between the force and the pivot.
  • Formula:
    • Ï„ = F × d
    • where:
      • Ï„ = torque
      • F = force
      • d = distance

Clockwise & Anti-clockwise Moment

  • A moment which tends to rotate an object or system in a clockwise direction is a clockwise moment (CW).
  • A moment which tends to rotate an object or system in an anticlockwise direction is an anticlockwise moment (ACW)
  • SI unit is Newton Metres (Nm)

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Description

Test your understanding of the moment of force, also known as torque. This quiz covers the essential formulas, units, and concepts related to clockwise and anticlockwise moments. Dive in to explore the foundational principles of rotational dynamics.

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