CBSE Class 11 (Science) workenergy — practice questions
41 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) workenergy in the app →As per your syllabus, A · B equals which expression?As per your syllabus, the dot product of two PERPENDICULAR vectors is which value?As per your syllabus, î · î (dot product of a unit vector with itself) equals which value?As per your syllabus, the WORK done by a constant force F on an object undergoing displacement d is which?As per your syllabus, work done by a force perpendicular to the displacement (e.g. centripetal force in UCM) iAs per your syllabus, + Points 2, work done by FRICTION (or viscous force) on a moving body is which?As per your syllabus, the KINETIC energy of a body of mass m moving with speed v is which?As per your syllabus, the WORK-ENERGY theorem states that net work done equals which quantity?As per your syllabus, the kinetic energy is which kind of quantity?As per your syllabus, a bullet of mass 50 g at 200 m/s emerges from plywood with 10% of initial KE. The emergeAs per your syllabus, the dimensions of kinetic energy (and of work) are which?As per your syllabus, the scalar product is which property algebraically?As per your syllabus, the work done by a VARIABLE force F(x) over displacement from x_i to x_f is which?As per your syllabus, the GRAVITATIONAL potential energy of a mass m at height h above the ground (g constant)As per your syllabus, / 5.8, a force is CONSERVATIVE if work done over a closed path equals which value?As per your syllabus, eqn 5.9, a conservative force F(x) is related to its potential V(x) by which relation?As per your syllabus, example, a ball dropped from height h has speed at the ground equal to which value?As per your syllabus, is there an associated POTENTIAL ENERGY for FRICTION?As per your syllabus, the zero of GRAVITATIONAL potential energy is conventionally chosen at which level?As per your syllabus, the dimensions of POTENTIAL energy are the same as those of which quantity?As per your syllabus, an object dropped from height h, just before hitting the ground, has kinetic energy equaAs per your syllabus, the total mechanical energy E in a conservative system is which sum?As per your syllabus, eqn 5.16, Hooke's law for an ideal spring states the spring force F_s is which?As per your syllabus, the SI unit of the spring constant k is which?As per your syllabus, the elastic potential energy stored in a spring extended by x is which?As per your syllabus, Fig 5.8, in a spring-mass system at maximum extension (x = ±x_max), the kinetic energy oAs per your syllabus, Fig 5.8, at the equilibrium position (x = 0) of a spring-mass system, the kinetic energyAs per your syllabus, AVERAGE power is defined as which ratio?As per your syllabus, INSTANTANEOUS power is given by which expression in terms of F and v?As per your syllabus, 1 horsepower (hp) is approximately equal to which value?As per your syllabus, the unit kilowatt-hour (kWh) measures which physical quantity?As per your syllabus, a 1800 kg elevator going up at 2 m/s against 4000 N friction needs minimum motor power aAs per your syllabus, + Summary, the dimensions of POWER are which?As per your syllabus, an ELASTIC collision conserves which two quantities?As per your syllabus, in an INELASTIC collision, which quantity is conserved (and which is not)?As per your syllabus, eqn 5.22, in a COMPLETELY inelastic 1D collision (mass m₁ at v₁ hits m₂ at rest), the coAs per your syllabus, eqn 5.26 / 5.27, in an ELASTIC 1D collision of m₁ (v₁) with m₂ (at rest), the final veloAs per your syllabus, (2D elastic between EQUAL masses, one at rest), the two final velocities make which anglAs per your syllabus, two cars colliding and locking together (no rebound) is an example of which collision tyAs per your syllabus, during the collision interval itself, conservation of momentum holds at which moments?As per your syllabus, how many conservation equations does linear momentum yield in 3D?