Physics Chapter on Measurement and Units

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Questions and Answers

What is the primary unit of mass in the SI system?

Grams (g)

Kilograms (kg) (correct)

Newtons (N)

Pounds (lbs)

Weight is a scalar quantity.

False

Which type of energy is associated with motion?

Kinetic Energy (correct)

Chemical Energy

Potential Energy

Magnetic Energy

What must you do first when reading a micrometer screw gauge?

Write down main scale reading. Signup and view all the answers

The formula for calculating weight is $W = ______$

mg Signup and view all the answers

Quantitative observation involves using your senses.

False Signup and view all the answers

Match the measuring tool with its correct function:

Vernier Caliper = Measures small lengths in cm Micrometer Screw Gauge = Measures small lengths in mm Spring Balance = Measures weight Electronic Balance = Measures mass Signup and view all the answers

What is the SI unit for mass?

Kilogram Signup and view all the answers

The study of matter and energy is known as __________.

Physics Signup and view all the answers

Match the SI units with their corresponding base quantity:

Length = metre (m) Mass = Kilogram (kg) Time = Second (s) Electric current = Ampere (A) Signup and view all the answers

Which of the following best describes a digital scale?

Reads measurements from a display that changes by a fixed minimum amount Signup and view all the answers

Non-linear scales have evenly spaced graduations.

False Signup and view all the answers

What does the symbol 'T' represent in the formula $T = F \times d$?

Turning effect Signup and view all the answers

An increase in distance can decrease the moment of force.

False Signup and view all the answers

What is the purpose of calibrating a scale?

To set or check the graduations by comparing to a universally accepted value Signup and view all the answers

The _____ refers to how close an experimental value is to the true value.

accuracy Signup and view all the answers

What is the SI unit of moment of force?

Newton Metres Signup and view all the answers

The moment which tends to rotate an object in a counterclockwise direction is called an ______ moment.

anticlockwise Signup and view all the answers

Match the following factors of measuring instruments with their definitions:

Range = The closeness of a measured value to the actual value Sensitivity = The response to the smallest change in measurement Accuracy = The size of the interval between max and min values Precision = How small the uncertainty in the measurement is Signup and view all the answers

Match the terms related to moment of force with their definitions:

F = Force applied d = Distance from pivot T = Turning effect cw = Clockwise moment Signup and view all the answers

What does Hooke's Law state about the relationship between force and extension of a spring?

Extension is directly proportional to the load, provided the elastic limit is not exceeded. Signup and view all the answers

The line of best fit must pass through all the data points.

False Signup and view all the answers

What does the variable 'k' represent in Hooke's Law?

spring constant Signup and view all the answers

In the formula $F = kx$, the letter 'F' represents the ______.

force/load Signup and view all the answers

Match the terms with their correct descriptions:

Extension = The amount a spring stretches or compresses Elastic limit = The maximum extent to which a material can be deformed Load = The force applied to a spring Spring constant = A measure of a spring's stiffness Signup and view all the answers

What is the formula to compute density?

$ ho = rac{m}{V}$ Signup and view all the answers

The gradient of a graph is calculated by the formula $Gradient = rac{y_2+y_1}{x_2+x_1}$.

False Signup and view all the answers

What does the equation $V = rac{m}{ ho}$ represent?

Volume of a substance Signup and view all the answers

The volume of water displaced can be calculated using the formula _______.

$V_2 - V_1$ Signup and view all the answers

Match the following units with their conversions:

1 g/cm³ = 1000 kg/m³ 1 kg/m³ = 1000 g/cm³ Signup and view all the answers

What is the volume of a cube with a side length of 2 cm?

8 cm³ Signup and view all the answers

The SI unit for measuring volume is liters.

False Signup and view all the answers

What formula would you use to calculate the volume of a cylinder?

$\pi r^{2} h$ Signup and view all the answers

The volume of a ________ is calculated using the formula $rac{4}{3} imes rac{ ext{pi}}{r^{3}}$.

sphere Signup and view all the answers

Match the following shapes with their respective volume formulas:

Cube = $s^{3}$ Cuboid = $L imes W imes H$ Cylinder = $ ext{pi} r^{2} h$ Sphere = $rac{4}{3} ext{pi} r^{3}$ Signup and view all the answers

What is the format of writing a number in scientific notation?

$a imes 10^{b}$ Signup and view all the answers

Distance is a vector quantity.

False Signup and view all the answers

What is the main difference between speed and velocity?

Speed is a scalar quantity that measures how fast an object moves without regard to direction, while velocity is a vector quantity that includes both speed and direction. Signup and view all the answers

Displacement is a ______ quantity that includes both magnitude and direction.

vector Signup and view all the answers

Match the following quantities with their definitions:

Speed = Rate of change of distance Velocity = Rate of change of distance in a specific direction Distance = Magnitude of separation between two points Displacement = Change in position with direction Signup and view all the answers

What is the derived unit for density?

kg/m³ Signup and view all the answers

Giga represents a value of 10^6.

False Signup and view all the answers

What is the SI unit for volume?

m³ Signup and view all the answers

Area is defined as length multiplied by ______.

breadth Signup and view all the answers

Match the following prefixes with their corresponding values:

Kilo = 10³ Centi = 10⁻² Milli = 10⁻³ Giga = 10⁹ Signup and view all the answers

Study Notes

Moment of Force (Torque)

The product of the force and the distance between the force and the pivot
Formula:
- τ = F × d
- τ = moment
- F = force
- d = distance
You can increase turning effect by increasing weight or distance from pivot

Clockwise & Anti-clockwise Torment

A moment which tends to rotate an object or system in a clockwise direction is a clockwise moment (cw) and vise versa
SI unit is Newton Metres (Nm)

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Description

Test your understanding of key concepts in physics related to measurement and units. This quiz covers topics such as the SI unit of mass, types of energy, and the principles of calibration. Perfect for students looking to solidify their knowledge in physics fundamentals.

Physics Chapter on Measurement and Units

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Podcast

Questions and Answers

What is the primary unit of mass in the SI system?

Weight is a scalar quantity.

Which type of energy is associated with motion?

What must you do first when reading a micrometer screw gauge?

The formula for calculating weight is $W = ______$

Quantitative observation involves using your senses.

Match the measuring tool with its correct function:

What is the SI unit for mass?

The study of matter and energy is known as __________.

Match the SI units with their corresponding base quantity:

Which of the following best describes a digital scale?

Non-linear scales have evenly spaced graduations.

What does the symbol 'T' represent in the formula $T = F \times d$?

An increase in distance can decrease the moment of force.

What is the purpose of calibrating a scale?

The _____ refers to how close an experimental value is to the true value.

What is the SI unit of moment of force?

The moment which tends to rotate an object in a counterclockwise direction is called an ______ moment.

Match the following factors of measuring instruments with their definitions:

Match the terms related to moment of force with their definitions:

What does Hooke's Law state about the relationship between force and extension of a spring?

The line of best fit must pass through all the data points.

What does the variable 'k' represent in Hooke's Law?

In the formula $F = kx$, the letter 'F' represents the ______.

Match the terms with their correct descriptions:

What is the formula to compute density?

The gradient of a graph is calculated by the formula $Gradient = rac{y_2+y_1}{x_2+x_1}$.

What does the equation $V = rac{m}{ ho}$ represent?

The volume of water displaced can be calculated using the formula _______.

Match the following units with their conversions:

What is the volume of a cube with a side length of 2 cm?

The SI unit for measuring volume is liters.

What formula would you use to calculate the volume of a cylinder?

The volume of a ________ is calculated using the formula $ rac{4}{3} imes rac{ ext{pi}}{r^{3}}$.

Match the following shapes with their respective volume formulas:

What is the format of writing a number in scientific notation?

Distance is a vector quantity.

What is the main difference between speed and velocity?

Displacement is a ______ quantity that includes both magnitude and direction.

Match the following quantities with their definitions:

What is the derived unit for density?

Giga represents a value of 10^6.

What is the SI unit for volume?

Area is defined as length multiplied by ______.

Match the following prefixes with their corresponding values:

Study Notes

Moment of Force (Torque)

Clockwise & Anti-clockwise Torment

Studying That Suits You

Description

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The volume of a ________ is calculated using the formula $rac{4}{3} imes rac{ ext{pi}}{r^{3}}$.