CBSE Class 11 (Science) Laws of Motion — practice questions
99 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Laws of Motion in the app →Newton's first law of motion is also known as the law ofA cricket ball of mass 150 g moving at (3i+4j) m/s is hit to -(3i+4j) m/s. The magnitude of momentum change isConservation of linear momentum in a collision follows directly fromA force F acts on a 2 kg body for 3 s, changing its speed from 2 m/s to 8 m/s along the line of F. The magnituThe maximum static friction force on a body is f = μN. Static friction is best described asA 10 kg block on a frictionless surface is pulled by 20 N horizontally and 20 N at 60° above horizontal. The hImpulse equalsA body in equilibrium under several forces hasA 0.5 kg ball hits a wall at 10 m/s and rebounds at 10 m/s. The impulse on the ball isNewton's second law in vector form isA lift accelerates upward at 2 m/s². The apparent weight of a 50 kg person (g=10) isTwo blocks of 2 kg and 3 kg connected by a string are pulled by 10 N on the 3 kg block (frictionless). The accThe SI unit of force, the newton, equalsAs per your syllabus, Aristotle's fallacy held that a force is required for which condition?As per your syllabus, a ball released on a frictionless incline rises on the other side to which height?As per your syllabus, INERTIA of a body is best described as which property?As per your syllabus, Newton's FIRST law states which of the following?As per your syllabus, the QUANTITATIVE measure of inertia of a body is which physical quantity?As per your syllabus, the momentum p of a body of mass m moving with velocity v is which?As per your syllabus, momentum p is a vector with direction along which vector?As per your syllabus, why is a SHORTER stopping time more painful when catching a cricket ball?As per your syllabus, when a stationary bus suddenly starts, passengers are jerked backward primarily because As per your syllabus, a body moving on it must do which?As per your syllabus, the SI unit of momentum is which?As per your syllabus, Newton's SECOND law in SI units states which relation?As per your syllabus, the SI unit of force is the newton, with one newton equal to which value?As per your syllabus, the IMPULSE J of a force F acting for time Δt equals which quantity?As per your syllabus, an IMPULSIVE FORCE is best described by which feature?As per your syllabus, a 0.15 kg cricket ball at 12 m/s is hit back at 12 m/s along the same line. The impulse As per your syllabus, the dimensions of FORCE are which set?As per your syllabus, the second law F = m a is valid in which kind of reference frame?As per your syllabus, for a body of constant mass, the second law reduces to which form?As per your syllabus, the impulse-momentum theorem states that the impulse on a body equals which quantity?As per your syllabus, the dimensions of IMPULSE are the same as those of which quantity?As per your syllabus, the SI unit of IMPULSE is which?As per your syllabus, the total momentum of an ISOLATED system (no external force) is which?As per your syllabus, conservation of momentum applies in which kind of collisions between two bodies?As per your syllabus, in a recoil scenario (a bullet of mass m fired at v from a rifle of mass M, initially atAs per your syllabus, when a billiard ball strikes the wall normally at speed u and reflects at speed u, the iAs per your syllabus, when you push a wall, the wall pushes back with which force?As per your syllabus, the necessary condition for a particle to be in EQUILIBRIUM is which?As per your syllabus, the SI unit of force from Newton's second law is which?As per your syllabus, which statement about the labels is true?As per your syllabus, the maximum STATIC friction force on a block on a horizontal surface obeys which inequalAs per your syllabus, KINETIC (sliding) friction is approximately given by which relation?As per your syllabus, the coefficients of static and kinetic friction satisfy which order?As per your syllabus, the MAXIMUM acceleration of a train such that a box on its floor (μ_s = 0.15) remains stAs per your syllabus, if a mass just starts to slide at angle θ = 15°, the coefficient of static friction is wAs per your syllabus, among rolling, sliding (kinetic), and static friction, which is typically LOWEST?As per your syllabus, eqn 4.16, the CENTRIPETAL force needed for a body of mass m moving at speed v in a circlAs per your syllabus, eqn 4.18, the maximum speed of a car on a LEVEL circular road of radius R is which?As per your syllabus, eqn 4.22, the OPTIMUM speed (no friction needed) on a banked road of angle θ is which?As per your syllabus, a cyclist taking a R=3 m turn at 18 km/h (μ_s = 0.1) is in which condition?As per your syllabus, a R=300 m banked-at-15° racetrack with μ = 0.2 has optimum speed approximately which valAristotle held that keeping a body moving needs something:Aristotle explained a flying arrow by saying it is pushed by:The Aristotelian law of motion is now regarded as:The correct answer to the puzzle of motion came from:Galileo's answer became the foundation of mechanics that is:Galileo's revolutionary ideas dethroned the mechanics of:Galileo's reasoning about motion led him to the law of:By the first law, zero net external force means acceleration is:Acceleration can be non zero only if there is a net external:A spaceship far from everything with rockets off has net force:That spaceship, if already moving, continues with velocity that is:The second law of motion is described as a law that is:Internal forces within a system cancel away in:For an isolated system of particles, the conserved quantity is:Conservation of momentum follows from the second law and the:Isaac Newton was born in the year:Newton was born in the same year that saw the death of:Newton returned to his mother's farm in 1665 because of a:Newton was encouraged to write his great work by his friend:When studying one body only, the forces that matter number:Adding an action and its reaction to claim zero net force is an:Contact forces like friction ultimately arise from:The laws of friction are best described as:Friction between two surfaces in contact opposes:A box stays at rest on the floor of an accelerating train. What accelerates it?Crate on a truck bed, μs = 0.25, g = 10 m/s². Highest truck acceleration with no slipping?In the spring law F = -kx, the minus sign means:Forces of 3 N and 4 N act at right angles on a particle. What third force keeps it in equilibrium?A 4 kg mass on a rope is held aside by a 30 N horizontal pull (g = 10 m/s²). Upper rope tension?Which of these forces acting on a body is a contact force?For equal weight, how does rolling friction compare with sliding?Why are ball bearings placed between moving parts of a machine?How does the coefficient of kinetic friction compare with that of static friction for the same surfaces?A car takes a turn on a flat horizontal road. Which force supplies the centripetal force?A stone is whirled in a circle on a string. What provides its centripetal force?A car rounds a flat curve of radius 80 m with µs = 0.5 and g = 10 m/s². Maximum safe speed?Which expression gives the SI unit of force, the newton, in base units?Second law is a local law. What does this say about acceleration?Impulse is the product of force and time. What else is it equal to?What may be assumed about position during a brief impulsive force?Which statement on action and reaction forces is correct?A body is in complete equilibrium. Besides zero net force, what else holds?What does Newton's second law reduce to when the net force on a body is zero?On a perfectly smooth train floor, what happens to a box as the train speeds up?Newton's second law is a vector equation. What does this imply for force and acceleration?