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🇵🇰 NTS NAT-IE · flashcards
NTS NAT-IE Physics Flashcards
50 question-and-answer cards covering Physics as it is examined in NTS NAT-IE. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Physics deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
Define inertia and state what it depends on.
Inertia is the tendency of a body to resist changes in its state of rest or motion; it depends on (is measured by) the body's mass.
What is the difference between mass and weight?
Mass is the amount of matter in a body (scalar, kg, constant); weight is the gravitational force on it (W = mg, vector, newtons, varies with g).
Define linear momentum and give its formula and SI unit.
Momentum is the product of mass and velocity, p = mv. Its SI unit is kg·m·s⁻¹ (or N·s).
Define impulse and state how it relates to momentum.
Impulse is the product of force and the time it acts, J = F·t. Impulse equals the change in momentum: F·t = Δp = mv − mu.
State the law of conservation of linear momentum.
In the absence of external forces, the total momentum of a system remains constant before and after a collision or interaction.
What is the difference between an elastic and an inelastic collision?
In an elastic collision both momentum and kinetic energy are conserved; in an inelastic collision momentum is conserved but kinetic energy is not (some is converted to other forms).
Write the momentum-conservation equation for two bodies colliding (masses m₁, m₂).
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂, where u are initial and v are final velocities.
Define work done by a force and give its formula and SI unit.
Work is the product of force and displacement in the direction of the force: W = F·s·cos θ. SI unit is the joule (J).
When is the work done by a force zero?
When there is no displacement, or when the force is perpendicular to the displacement (θ = 90°, so cos θ = 0).
State the formula for kinetic energy.
KE = ½mv², where m is mass and v is speed.
State the formula for gravitational potential energy near Earth's surface.
PE = mgh, where m is mass, g is gravitational acceleration, and h is height above the reference level.
State the work-energy theorem.
The net work done on a body equals the change in its kinetic energy: W_net = ½mv² − ½mu².
State the law of conservation of energy.
Energy can neither be created nor destroyed, only transformed from one form to another; the total energy of an isolated system remains constant.
For a body falling freely, how does the sum of KE and PE behave (ignoring air resistance)?
It remains constant; PE lost equals KE gained, so total mechanical energy is conserved.
Define power and give its formula and SI unit.
Power is the rate of doing work or transferring energy: P = W/t. SI unit is the watt (W = J·s⁻¹).
Express power in terms of force and velocity.
P = F·v, where F is the force in the direction of motion and v is velocity.
Define efficiency and give its formula.
Efficiency is the ratio of useful output energy (or power) to total input energy (or power): Efficiency = (useful output / total input) × 100%.
Why is the efficiency of a real machine always less than 100%?
Because some input energy is always lost to surroundings as wasted forms such as heat (due to friction), sound, or light.
Define angular displacement and angular velocity, with the SI unit of each.
Angular displacement is the angle swept, measured in radians (rad). Angular velocity ω is the rate of change of angular displacement, measured in rad·s⁻¹.
State the relationship between linear speed v and angular velocity ω.
v = rω, where r is the radius of the circular path.
Define centripetal acceleration and give its formula.
Centripetal acceleration is the acceleration directed toward the centre of a circular path: a = v²/r = rω².
What is centripetal force, its direction, and its formula?
Centripetal force is the net force keeping a body in circular motion, directed toward the centre: F = mv²/r = mrω².
Define torque (moment of a force) and give its formula and SI unit.
Torque is the turning effect of a force: τ = F·r·sin θ (force × perpendicular distance from the axis). SI unit is the newton-metre (N·m).
Define moment of inertia and state its rotational analogy.
Moment of inertia (I) is a body's resistance to angular acceleration, depending on mass and its distribution about the axis (I = Σmr²). It is the rotational analogue of mass, and τ = Iα.
What this deck covers
The Physics deck follows the NTS NAT-IE Physics syllabus — 8 chapters and 25 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 6.3 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 114 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Physics flashcards FAQ
How many Physics flashcards are in this NTS NAT-IE deck?
50 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these NTS NAT-IE flashcards free?
Yes. The preview here is free to read with no signup, and the full 50-card deck is free inside the Examius app.
What do the Physics cards cover?
They follow the NTS NAT-IE Physics syllabus — 8 chapters and 25 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.