Laws of Motion, Work, Energy and Power

Physics: Laws of Motion, Work, Energy and Power

• A curved road with a diameter of 1.8 km is banked for a vehicle to turn at 30 m/s without friction; the banking angle is tan⁻¹(0.1), given g = 10 m/s².
• Two blocks, A (6 kg) and B (3 kg), are at rest on a smooth horizontal surface. The maximum horizontal force that can be applied to block A to move them together is 12 N, assuming a coefficient of friction of 0.4 between A and B.
• The magnitude of the force acting on a particle at t = 1 s is 3 N, with its momentum varying as P = 3t + 4 kg m/s.
• A body moved by a machine delivering constant power travels a distance proportional to t^(3/2).
• In a system with two masses (5 kg and 10 kg) connected by light strings, the tension in the string supporting both masses is 100 N (g = 10 m/s²).
• The work done by a force F = 2i + 2j around a square path OABCO of side 'a' is zero.
• The linear momentum of a system remains constant when no external force acts on it.
• A 10 kg block on a 60° inclined plane experiences a normal reaction of 50√3 N (g = 10 m/s²).
• The magnitude of the tension in the horizontal string AB required to keep the 10 kg block is equilibrium is 100N.
• A 4 kg body starting from rest reaches 5 m/s in 2 s; the average force acting on it is 10 N.
• Law of conservation of momentum remains valid during inelastic collisions.
• The minimum force required to hold a block of mass M against a rough vertical wall with friction coefficient µ is Mg/µ.
• A 1 kg block on a rough horizontal surface (µ = 0.5) pulled by an 8 N force has a net work done of 30 J after covering 10 m (g = 10 ms⁻²).
• For a particle in uniform circular motion with linear momentum magnitude p, the radial force is p²/rm, where m is mass and r is radius.
• Instantaneous power is given by the expression F→ ⋅ v→.
• A body under external unbalanced forces will move with some acceleration.
• A force of 100 N acting for 10 ms changes the velocity of a 1 kg body from 20 m/s to approximately 20.05 m/s.
• A body of mass 2kg and with 2 Ns momentum has 1/2 J Kinetic energy.
• The ratio of normal contact forces for blocks A and B as indicated at the image is 1:4
• A 0.2 kg ball decelerating from 20 m/s to a stop in 0.1 s experiences a force of 40 N.
• Percentage loss of energy in dropping a ball from height h to a floor where it attains h/4 height is 75%.
• A rider falls backward when a horse starts suddenly due to inertia of rest.
• For a 1 kg block forced up a 30° incline by a 12 N force, the work done by gravity is -25 J, and by friction is -15 J (g = 10 m/s²).
• In a perfectly elastic collision between two identical balls, the velocity of ball C after collision is zero.
• Work done by a force is zero when the displacement of the point of application of force is zero.
• The force needed to keep the block at equilibrium in given figure is Mg/2 (pulley and string are massless.)
• A force of (3i + 4j + 5k) acting on a body for 2 seconds produces a displacement of (2i + 3j + 2k)m. The power is 14 W.
• An applied impulse of mv/√3 is the value imparted on the wall by the described object.
• Action and reaction forces are antiparallel to each other.
• The acceleration of the particle at the bottom of the inclined plane is √[2gl(sinθ – μcosθ)].
• A body constrained to move along the z-axis under a force F = (2i + 3j – 5k) N has work done of 30 J over 6 m.
• The work done by force F = (4i - 3j + 2k) Non moving a particle from P (1, 1, 0) m to Q (3, 2, 1) m is 7 J.
• Dyne is CGS unit of force.
• As a body falls, its potential energy decreases and kinetic energy increases.
• A bullet of mass 200 g with velocity change from 20 m/s to 10 m/s after striking a wooden block has work done by resistive forces of –30 J.

Section B Physics

• Friction coefficient for angle of repose 37° is 0.75,
• It will cause the motion of body statements is correct for frictional force.
• A heavy uniform chain lies on a horizontal table top. If the coefficient of friction between chain and table top is 0.4, then the maximum fraction of length of the chain that can hang over the edge of table is1/3.
• A heavy stone thrown from height h hits ground with maximum speed when thrown vertically downward (neglecting air resistance).
• The gravitation force done by a stone (mass 20g from 2km, 200m/s) is 400J
• When a spring is stretched by 1 cm, it stores energy 50 J. If it is further stretched by 1 cm,the stored energy will be 150J.
• The acceleration of the child is 2 m/s2 if a child weighing 25 kg slides down a rope hanging from a branch of a tall tree and force of friction is 200N
• The work done by a position release x=(t2+2t)m from 0 to 2sec is 16J
• The particle will be in equilibrium in position A and C (based on diagrams).
• The rated power of the engine is 25kW, if an engine lifts 400 kg mass through a height of 100 m in 20 s and the efficiency of engine is 80% (g = 10 m/s²)
• The work done by centripetal force when a body is rotated with uniform speed in a circle is Zero.
• The acceleration of 6kg mass figure is 2 ms^-2
• Limiting friction The maximum force of static friction up to which body does not move is called:
• Element of highest electronegativity among the following is Oxygen

Chemistry: Classification of elements and periodicity in properties, Chemical bonding and molecular structure

• The atomic number of the element present in fourth period and sixth group of the modern periodic table is 24.
• Reasons for variation in chemical behavior is related to small size, large charge/radius ratio, high electronegativity, unavailability of d-orbitals.. Correct reasons are (a), (b) and (c) only
• The IUPAC symbol for the element having atomic number 106 is Unh.
• The pair of elements with diagonal relationship is Be and Al.
• As for what increases first ionization enthalpies, the given sequence of B < C < N is correct.
• Incorrect order for atomic/ionic radii is 0^2- < Na+.
• Molecule with highest polarity among the following is HF.
• Of the following the molecule which does not have tetrahedral geometry is PCl5.
• One of the following oxides N02 is expected to have odd number of valence electron.
• Linear molecule among the folliwng is C2(CN)2
• Maximum number of atoms present in a plane in S5FB is 4
• NH4>NH3>NH2 is the Correct order of bond angle
• sp3, sp2, sp The hybridisation of C1, C2 and C5 in the following compound respectively are
• • [PtCl4]2- Species which has square planar shape is
• 7 Number of electrons present in antibonding molecular orbitals in N2 ion is
• sp Which among the following hybrid orbitals has the maximum % s-character?
• Maximum covalent character is present in CsF because it is the largest element.
• (2) C-H > C–N > O-H is Correct order of bond length
• HCI Hydrogen bond is not observed in
• Isostructural is (3) I3, C2H2
• Both statement I and II are incorrect choose the correct option if statement 1 is :Total number of electrons present in π antibonding molecular orbital of
• N2 is zero. Statement II: Total number of antibonding electrons in N2 is 4.
• Reason and assertion is that : - O ion makes the second electron gain process an endothermic.
• Shape of XeOF2 molecule is - See-saw.

Chemistry Section B

• a(ii), b(iv), c(i), d(iii) match the column in the order of the table
• d(ii)103 is: Lawrencium match the atomic number given in List-I with
• zero overlapping ? The best representation for
• Statement I is incorrect but statement II is correct what is happening with (90)
• (2 correct with assertion and reasoning statement.
• Number of lone pair is a CIF3 = 12.
• s2. lon which has the largest size is S^2- .
• Isostructural pair among the following is ⊕ SF4 and NH4
• • The correct answer is (2) in (90) - a claim-based statement. - Which among the following has maximum bond length? - The answer is (3) C ≡ C.
• highest ionization energy? is (3) Na+.
• LICI Which among the following has highest lattice enthalpy?
• Bond order of C2 molecule is 3.

Botany: Biological Classification & Morphology of Flowering Plants

• Nostoc does not have Heterotrophic mode of nutrition.
• A sleeping sickness causing organism is a parasitic protozoan with flagella.
• Bacteria reproduce by means of Spores under unfavourable conditions.
• Autotrophic bacteria are most abundant in nature is not a correct statement
• The red tides in the oceans are mainly caused by Gonyaulax.
• Dikaryophase is seen during the sexual reproduction of Mushroom.
• Edible members of Ascomycetes are Morels and truffles.
• Fungi growing on cow dung are called Coprophilous.
• Eukaroytes and prokaryotes distinguish two kingdom system of classification
• Albugo has Mycelium is aseptate and coenocytic
• Double stranded DNA Viruses that infect bacteria usually have
• Protista:Chlorella and Amoeba
• Potato spindle tuber disease is an Infectious agent
• Slime moulds Produce spores under unfavourable conditions
• Are capable of converting CH4 intomethanogens CO2
• Freshwater forms nor marine forms are Cyanobacteria
• is used extensively in biochemicaland genetic work is Neurospora
• belonging to mustard flowers belongs Polyadelphous stamens
• maize .Seed coat is membranous and fused withfruit wall in
• Persistent calyx is Fruits of Brinjal
• does not have he modified storage tap root, is Sweet potato
• being in Thorns and spines of plants, is The structures for self defence
• develops at the base of the ovary inthe placenta is 1) Marigold
• :127 The edible part of mango fruit is 3) Mesocarp
• Micropyle of dicot seed. Forms seed coat: 1) Develops from integuments
• Not distint: 2) calyx and corolla
• Incorrect match: 3) green expanded part of leaf (Petiole)
• compound leaf differs from a simple leaf in: Bearing axillary buds in axil of its leaflets -131
• sensitive structures:. Tendrils of pea differ from cucumberas the former:
• Medicinal plant: Muliathi medicinal plant is from family Fabaceae
• the following is not true w.r.t.modification of leaves?: Leaves in grapevines are convertedinto tendrils for climbing 134
• 135: The region where root hairs are present is: The region of Maturation 4
• Ascomycetes andDeuteromycetes: Production of sexual spores

Section B Botany

• 137: Euglenoids are photosynthetic and heterotrophic in the sun
• 138: Prions areDevoid of proteins
• 139: Sexual reproduction happens in the sequence: Plasmogamy, Plasmogamy,Meiosis
• 140: Loose tissue body organisationis characteristic of Fungi
• 140: Loose tissue body organisation of characteristic feature isFungi 141-Fungi and plantae common quality -Presence of cell wall
• 142 aristole classified animals by -Morphological characters
• stift outer layr -Dinoflagellates
• -Monocots-Fibrous root system
• for better respiration Pneumatophores .
• pistia Odd-one w r t underground stem
• colchine including plant. Member of angiospermicfamily that is non endo spermic Member of angiospermicfamily that is
• -prop-Banyan
• Main axis -In Cymose inflorescence The feature in china rose is 3- perigynous flower
• 151 Elimination of glucose Respiration is helpful in all, except

Zoology: Breathing & Exchange of Gases, Body Fluids & Circulation

Section A Zoology

• Respiration is not helpful for (4) Elimination of glucose
• Is insignificant role of oxygen in respiratory rhythm
• 20-25 In humans, solubility of CO2 in the blood is - --times higher than 02.
• ERV + RV, Match column I with column II and select the
• the following best describes inspiration when there positive pressure Select four
• CO2 is transportedCarbaminohaemoglobin
• 71-SAN pacemaker -Reason.correct
• 84 all lungs only -Blood vessel and a single
• Ateries
• 87 increased and c02
• 91, 3 2 chamber with -reptiles
• 2:381 Reason, -lower
• 83 pulmonary vien what does not have -73 to prevent collapsing-AV valvuates -88 pulmonary vien correct-315 and 5 inter coastal correct -41