Which of these is classified as a fluid?, Only liquids, Only gases, Liquids and gases, Only water, In which direction does drag act?, Along the motion, Opposite relative motion, Always upward, Always downward, Why does a cyclist bend forward when racing?, To increase weight, To increase friction, To increase drag, To reduce air resistance, What happens to acceleration at terminal velocity?, It becomes zero, It increases, It doubles, It becomes infinite, Which force keeps a floating boat from sinking?, Friction, Air resistance, Upthrust, Magnetic force, Newton's third-law forces always act on:, The same object, Different objects, Only moving objects, Only heavy objects, The forces in a third-law pair are:, Equal and opposite, Equal and parallel, Always vertical, Different in size, Which is the SI base unit of mass?, Newton, Gram, Pound, Kilogram, What is the SI unit of force?, Joule, Newton, Watt, Pascal, Which prefix represents 10⁻³?, Kilo, Micro, Milli, Mega, A 600 kg car has a resultant force of 1200 N. Find its acceleration., 0.5 m/s², 1 m/s², 2 m/s², 3 m/s², A car has a forward force of 500 N and drag of 200 N. What is the resultant force?, 300 N forward, 700 N forward, 300 N backward, Zero, When a falling object reaches terminal velocity, its speed:, Decreases to zero, Keeps increasing, Becomes infinite, Remains constant, Why does a resistance parachute slow down a runner?, It reduces mass, It increases drag, It reduces gravity, It removes friction, A floating object weighs 80 N. What is its upthrust?, 40 N, 160 N, 80 N, 0 N, A swimmer pushes water backward. What pushes the swimmer forward?, The water, Gravity, Air resistance, The swimmer's weight, A student pushes a wall with 50 N. The wall pushes back with:, 0 N, 25 N, 100 N, 50 N, Which pair is NOT a Newton's third-law force pair?, Foot on ground and ground on foot, Weight and normal force on one book, Earth on Moon and Moon on Earth, Hand on wall and wall on hand, Convert 2.5 km into metres., 250 m, 25,000 m, 2500 m, 0.0025 m, Which is equivalent to 1 N?, kg m s⁻², kg m s⁻¹, kg m² s⁻², kg m⁻¹ s⁻², A car has drag F = 0.2v². Find drag at 30 m/s., 60 N, 90 N, 360 N, 180 N, An engine supplies 800 N and drag is 0.5v². Find the maximum steady speed., 20 m/s, 40 m/s, 80 m/s, 160 m/s, A 5 kg object falls at constant speed in air. Ignore upthrust. Find drag (g = 9.8 N/kg)., 5 N, 9.8 N, 49 N, 98 N, A body displaces 0.002 m³ of water. Find upthrust (ρ = 1000 kg/m³, g = 10 N/kg)., 20 N, 2 N, 200 N, 2000 N, A 2 kg submerged block weighs 20 N and experiences 6 N upthrust. What upward tension holds it still?, 26 N, 20 N, 6 N, 14 N, A 60 kg student and 5 kg skateboard experience a net horizontal force of 130 N. Find acceleration., 1 m/s², 2 m/s², 3 m/s², 4 m/s², A truck hits a small car. Compare their interaction forces., Truck exerts more, Car exerts more, Forces are equal, Depends on speed, Convert 0.75 g/cm³ to kg/m³., 750 kg/m³, 75 kg/m³, 7500 kg/m³, 0.75 kg/m³, What is 4 cm² expressed in m²?, 4 × 10⁻² m², 4 × 10⁻³ m², 4 × 10⁻⁶ m², 4 × 10⁻⁴ m², Which equation is dimensionally incorrect? (s = distance, u = speed, a = acceleration, t = time), s = ut, v = u + at, s = ut + at, s = ut + ½at²

PHYSICS QUIZ!

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