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Motion, Forces and Energy

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Physical quantities and measurement techniques

Subtopic

Physical quantities and measurement techniques under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When measuring the period of a simple pendulum, why is it standard practice to measure the time for 20 oscillations and then divide by 20?

    A.

    To ensure the pendulum swings at a constant speed

    B.

    To increase the amplitude of the oscillations

    C.

    To eliminate the effect of air resistance

    D.

    To reduce the effect of human reaction time errors

  2. 2.

    An engineer needs to measure the diameter of a very thin copper wire (approximately 0.50.5 mm) with high precision. Which instrument is most appropriate for this measurement?

    A.

    Vernier calipers

    B.

    Micrometer screw gauge

    C.

    Meter rule

    D.

    Measuring tape

  3. 3.

    In the International System of Units (SI), what is the base unit for thermodynamic temperature?

    A.

    Kelvin (KK)

    B.

    Degree Celsius (∘C^\circ C)

    C.

    Degree Fahrenheit (∘F^\circ F)

    D.

    Joule (JJ)

Download the worksheet for Motion, Forces and Energy - Physical quantities and measurement techniques to practice offline. It includes additional chapter-level practice questions.

Motion

Subtopic

Motion under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If a speed-time graph shows a horizontal line above the x-axis, what can be concluded about the object's motion?

    A.

    The object is at rest.

    B.

    The object is moving with constant acceleration.

    C.

    The object is moving with constant speed.

    D.

    The object is slowing down.

  2. 2.

    A cyclist travels a total distance of 4545 km in 1.51.5 hours. What is the average speed of the cyclist?

    A.

    30 km/h30\text{ km/h}

    B.

    67.5 km/h67.5\text{ km/h}

    C.

    45 km/h45\text{ km/h}

    D.

    15 km/h15\text{ km/h}

  3. 3.

    What does the gradient of a distance-time graph represent for an object in motion?

    A.

    The total displacement

    B.

    The acceleration

    C.

    The total time taken

    D.

    The speed

Download the worksheet for Motion, Forces and Energy - Motion to practice offline. It includes additional chapter-level practice questions.

Mass, weight and density

Subtopic

Mass, weight and density under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A student uses a measuring cylinder to find the volume of an irregularly shaped stone. Based on the process shown in the diagram, what is the volume of the stone?

    A.

    50 cm350\text{ cm}^3

    B.

    75 cm375\text{ cm}^3

    C.

    125 cm3125\text{ cm}^3

    D.

    25 cm325\text{ cm}^3

  2. 2.

    What is the standard SI unit for density?

    A.

    g/cm3\text{g/cm}^3

    B.

    kg/m3\text{kg/m}^3

    C.

    kg/m2\text{kg/m}^2

    D.

    N/m3\text{N/m}^3

  3. 3.

    An astronaut has a mass of 75 kg75\text{ kg} on Earth. Given that the gravitational field strength on Earth is 9.8 N/kg9.8\text{ N/kg}, what is the weight of the astronaut?

    A.

    7.65 N

    B.

    75 N

    C.

    735 N

    D.

    750 N

Download the worksheet for Motion, Forces and Energy - Mass, weight and density to practice offline. It includes additional chapter-level practice questions.

Effects of forces

Subtopic

Effects of forces under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When an object moves at a constant speed in a circular path, in which direction does the resultant force act?

    A.

    In the direction of the velocity

    B.

    Away from the center of the circle

    C.

    Opposite to the direction of motion

    D.

    Towards the center of the circle

  2. 2.

    Which of the following defines the 'moment of a force' about a pivot?

    A.

    The product of the force and the horizontal distance from the pivot

    B.

    The ratio of force to the area of the pivot

    C.

    The product of the force and the perpendicular distance from the pivot

    D.

    The sum of all forces acting on a rotating body

  3. 3.

    An object of mass 5.0 kg5.0\text{ kg} is acted upon by two forces: 15 N15\text{ N} acting to the right and 5 N5\text{ N} acting to the left. What is the acceleration of the object?

    A.

    4.0 m/s24.0\text{ m/s}^2

    B.

    2.0 m/s22.0\text{ m/s}^2

    C.

    3.0 m/s23.0\text{ m/s}^2

    D.

    0.5 m/s20.5\text{ m/s}^2

Download the worksheet for Motion, Forces and Energy - Effects of forces to practice offline. It includes additional chapter-level practice questions.

Moments

Subtopic

Moments under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which change would most effectively increase the stability of a physical object?

    A.

    Raising the center of mass and narrowing the base.

    B.

    Lowering the center of mass and narrowing the base.

    C.

    Raising the center of mass and widening the base.

    D.

    Lowering the center of mass and widening the base.

  2. 2.

    A uniform beam is balanced at its midpoint. A force of 10 N10\ N is applied at a distance of 0.5 m0.5\ m to the left of the pivot. What force must be applied 1.0 m1.0\ m to the right of the pivot to maintain equilibrium?

    A.

    20 N20\ N

    B.

    5 N5\ N

    C.

    10 N10\ N

    D.

    2.5 N2.5\ N

  3. 3.

    What is the SI unit for the moment of a force?

    A.

    N/mN/m

    B.

    kg⋅m/s2kg \cdot m/s^2

    C.

    N⋅mN \cdot m

    D.

    J/mJ/m

Download the worksheet for Motion, Forces and Energy - Moments to practice offline. It includes additional chapter-level practice questions.

Centre of gravity

Subtopic

Centre of gravity under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A student is using the plumb line method to find the centre of gravity of an irregularly shaped piece of cardboard (a lamina). What is the minimum number of suspension points required to accurately locate the centre of gravity?

    A.

    1

    B.

    2

    C.

    3

    D.

    4

  2. 2.

    For a uniform, flat rectangular sheet of metal, where is the centre of gravity located?

    A.

    At one of the four corners.

    B.

    At the midpoint of the longest side.

    C.

    At the intersection of its diagonals.

    D.

    Outside the physical boundaries of the sheet.

  3. 3.

    Why is a modern racing car designed with a very low centre of gravity?

    A.

    To increase the friction between the tires and the track.

    B.

    To reduce the overall weight of the vehicle.

    C.

    To increase stability and prevent the car from toppling during fast turns.

    D.

    To allow the car to accelerate faster in a straight line.

Download the worksheet for Motion, Forces and Energy - Centre of gravity to practice offline. It includes additional chapter-level practice questions.

Momentum

Subtopic

Momentum under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The term 'impulse' is defined as being equal to which of the following?

    A.

    The rate of change of momentum

    B.

    The total kinetic energy of a system

    C.

    The product of mass and acceleration

    D.

    The change in momentum

  2. 2.

    A ball of mass 1.5 kg1.5\text{ kg} is rolling across a floor with a constant velocity of 8.0 m/s8.0\text{ m/s}. What is the magnitude of its momentum?

    A.

    6.5 kg m/s6.5\text{ kg m/s}

    B.

    12.0 kg m/s12.0\text{ kg m/s}

    C.

    9.5 kg m/s9.5\text{ kg m/s}

    D.

    18.0 kg m/s18.0\text{ kg m/s}

  3. 3.

    Which of the following expressions correctly defines the momentum pp of an object with mass mm and velocity vv?

    A.

    p=m/vp = m/v

    B.

    p=0.5mv2p = 0.5 m v^2

    C.

    p=mvp = mv

    D.

    p=F/tp = F/t

Download the worksheet for Motion, Forces and Energy - Momentum to practice offline. It includes additional chapter-level practice questions.

Energy, work and power

Subtopic

Energy, work and power under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The diagram shows the energy distribution for a specific filament lamp. Based on the values provided, what is the efficiency of the lamp?

    A.

    85%

    B.

    15%

    C.

    17.6%

    D.

    11.7%

  2. 2.

    A crane lifts a 100 kg100\text{ kg} crate to a vertical height of 20 m20\text{ m}. Taking g=9.8 m/s2g = 9.8\text{ m/s}^2, calculate the gain in gravitational potential energy.

    A.

    19600 J

    B.

    2000 J

    C.

    1960 J

    D.

    200 J

  3. 3.

    An object of mass 4.0 kg4.0\text{ kg} is moving at a constant speed of 5.0 m/s5.0\text{ m/s}. Which of the following represents its kinetic energy (EkE_k)?

    A.

    10 J

    B.

    50 J

    C.

    20 J

    D.

    100 J

Download the worksheet for Motion, Forces and Energy - Energy, work and power to practice offline. It includes additional chapter-level practice questions.

Pressure

Subtopic

Pressure under Motion, Forces and Energy for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a mercury barometer used to measure atmospheric pressure, what is typically found in the space above the mercury column inside the sealed glass tube?

    A.

    Compressed air

    B.

    Water vapor

    C.

    Liquid mercury

    D.

    A vacuum

  2. 2.

    A person wearing snowshoes can walk across deep snow without sinking, whereas a person in normal boots sinks. Why does this happen?

    A.

    The snowshoes decrease the weight of the person.

    B.

    The snowshoes increase the contact area, reducing the pressure on the snow.

    C.

    The snowshoes decrease the contact area, increasing the pressure on the snow.

    D.

    The snowshoes create an upward lift force from the snow.

  3. 3.

    Which of the following factors does NOT affect the pressure at a specific point inside a liquid at rest?

    A.

    The density of the liquid

    B.

    The depth of the point below the surface

    C.

    The shape of the container holding the liquid

    D.

    The gravitational field strength

Download the worksheet for Motion, Forces and Energy - Pressure to practice offline. It includes additional chapter-level practice questions.

Motion, Forces and Energy - Grade 12 Physics (IGCSE) | Krit.club