Physics question and answers for June 04, 2024
- Q 1 A book is moved from rest through a distance of 4 m along a straight line path The mass of the block is 5 kg and the force acting...
- Q 5A car of mass 500 kg moving with a speed 36 km h in a straight road unidirectionally doubles its speed in 1 min The power delivered by the engine...
- Q The rate of mass of the gas emitted from rear of a rocket is initially 20 kg s If the speed of the gas relative to the rocket is 800...
- Q 21 Force 31 2 k N produces a displacement of 21 4 ck m the work done is 16 j then c a 1 b 2 c 1 d 2...
- Q cle about that point What will be the tension of the thread at the moment it will be passing the horizontal position 38 A horizontal plane supports a stationary vertical...
- Q Sand is poured on a conveyor belt at the rate of 2 kg s If belt is moving horizontally with velocity 4 m s then additional force required by engine...
- Q 8 A body of mass 5kg at rest is acted upon by two mutually perpendicular forces 6N and 8N simultanecusly Its kinetic energy after 10s is 1 100 J 2...
- Q When a constant power is delivered to an object initially at rest then the graph between velocity and position of the object is motion of object is along x axis...
- Q Three identical balls A B and C each of mass m 3 kg are connected by strings AB and BC as shown in the figure The whole system is placed...
- Q 37 Potential energy of a particle in conservative field is x X given by U x 4 2 2 3 0 1 1 J then maximum P E and minimum...
- Q 5 Potential energy curve of a body of mass m 2 kg is shown in the figure it is released from rest at point A Maximum distance covered by it...
- Q Two masses 2m and m are connected by an inextensible light string The string is passing over a light frictionless pulley The mass 2m is resting on a surface and...
- Q A particle is attached with massless string It displaced from A to B by a force of conste magnitude but its direction is always alor instantaneous displacement The work done...
- Q M strikes the block of mass M with In the shown figure a particle of mass 10 velocity vo and gets attached to it For what velocity vo in ms...
- Q 43 A uniform chain of mass 4 kg and length 2 m overhangs a smooth table with its one third part lying on the table Find the speed of chain...
- Q F K xi yi is working on a particle which moves from 0 0 to a 0 along x axis and a 0 to a a along y axis Find...
- Q Figure 8 E17 R M D Figure 8 E17 shows a smooth track which consists of a straight inclined part of length 1 joining smoothly with the circular part A...
- Q A smooth chain AB of mass m rest against a vertical wall in the form of a quarter of a circle of radius R Take potential energy zero at horizontal...
- Q Ca de Ban A cylindrical water tank 4 meters high with a radius of 2 meters is buried so that the top of the tank is 1 meter below ground...
- Q A ball is dropped from 100 m and it rebounds to a height of 70 m The percentage loss of energy is NCERT Pg 125 1 30 2 60 2...
- Q Illustration 12 A block is placed on the top of a plane inclined at 37 with horizontal The length of the plane is 5m The block slides down the plane...
- Q A vehicle of mass M is accelerated on a horizontal frictionless road under a force changing its velocity from u to v in distance S A constant power P is...
- Q A motorcycle of mass m resting on a frictionless road moves under the influence of a constant force F The work done by this force in moving the motorcycle is...
- Q A body with a mass of 3kg falls from a certan height with an initial velocity of 2 m s directed vertically downward If the work done in J to...
- Q Interaction between atoms of a diatomic molecule is a B described by the relation P E x where x12x6 P E is potential energy If the two atoms enjoy stable...
- Q 2 Now the force acts in a direction 30 00 above the horizontal as shown below If the block is again moved 2 50 m how much work is done...
- Q An engine of mass m is moving up a slope of inclination 0 at a speed V The coefficient of friction between engine and the rail is u If the...
- Q The unit of thermal W m K 1 c Jm K conductivity is b Jm K 1 d W m K 1
- Q Illustration 8 A pump is required to lift 1000 kg of water per minute from a well 20m deep and eject it at a rate of 20 m s a...
- Q A rod of mass m and length is kept on a smooth wedge of mass M as shown in the figure If the system is released when the rod is...
- Q A block of mass m is being pulled up the rough incline inclined at an angle 37 with horizontal by an agent delivering constant power P The coefficient of friction...
- Q Calculate the work done in pulling an object with a constant force F as shown in figure so that the block moves with a constant velocity through a distance d...
- Q A stone is falling freely in free space Its velocity is x when it has lost y units of potential energy in the gravitational field of earth The mass of...
- Q 5 What are conservative and non conservative forces explain with examples 6 What is meant by power and energy Give their units Art 4 6 Arts 4 7 and 4...
- Q A force given by F fxi fyj f k acts on a particle which moves from a b c to d e f The work done by force F is...
- Q 13 A person weighs 600 N He is wearing shoes with a total area of 0 02 m What pressure do they exert on the floor
- Q When a current of 2 A flows in a battery from negative to positive terminal the potential difference across it is 12 V If a current of 3 A flowing...
- Q The potential energy of a system increases if work is done 1 Upon the system by a nonconservative force 2 By the system against a conservative force 3 By the...
- Q A rope of length is pulled by a constant force F over a friction less horizontal surface Linear mass denstiy of the rope at a distance x from the end...
- Q A cradle is h meters above the ground at the lowest position and H meters when it is at the highest point If v is the maximum speed of the...
- Q Two riffles fire the same number of bullets in a given interval of time The second fires bullets of mass twice that fired by the first and with a velocity...
- Q A body is released from position A as shown in figure The speed of body at position B is NCERT Pg 121 50 m 1 10 m s 3 20...
- Q The internal energy of a substance a Increases with increase in temperature b Decreases with increase in temperature c Can be calculated by the relation E mc d Remain unaffected...
- Q ple kg and amplitude A 2 m the variation of potential energy U as a function of displacement x from mean position is as shown The time period of oscillation...
- Q A particle is thrown with kinetic energy k straight up a rough inclined plane of inclination a and coefficient of friction u The work done against friction before the particle...
- Q 9 The angular momentum of a particle performing uniform circular motion is L If the kinetic energy of partical is doubled and frequency is halved then angular momentum becomes 1...
- Q diment mass m kg moving in one time t in second by the equa Comprehension Type s in first six seconds is 4 36 m vi then the particle is...
- Q 16 The ball of mass m is thrown with speed Vo The ball strikes the block of mass 2m and sticks to it Find the maximum compression of spring gh...
- Q 41 Six charges are placed at the vertices of a regular hexagon as shown in the figure The electric field on the line passing through point O and perpendicular to...
- Q A body of mass 2 kg falls from a height of 20 m What is the loss in potential energy 1 400 J 2 300 J 3 200 J 4...
- Q Illustration 16 Force between the atoms of a diatomic molecule has its origin in the interaction the nuclei present in each atom This force is conservative and associated potential energy...
- Q Two discs A and B are mounted co axially on a vertical axle The discs have moments of inertia I and 21 respectively about the common axis Disc A is...
- Q A particle moves in the X Y plane under the influence of a force such that its is linear momentum P t A i cos kt j sin kt where...
- Q 4 A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m moving in the y direction with speed v...
- Q In an XY horizontal plane a force field F 40 N m yi x is present where x and y are the coordinates of any point on the plane A...
- Q A pendulum consisting of a massless string of length 20 cm and a tiny bob of mass 100 g is set up as a conical pendulum Its bob now performs...
- Q 41 The terminal potential difference across A and B in the circuit shown is 1 E Ir 3 E E www B r 2 E Ir 4 Zero
- Q A 1 0 hp motor pumps out water from a well of depth 20 m and fills a water tank of volume 2238 73 liters at a height of 10...
- Q A ball with mass mis attached to the end of a rod of mass M and length I The other end of the rod is pivoted so that the ball...
- Q Find the acceleration of block of mass m Assume pulleys are massless and frictionless A g 3 B 2g 3 C g 2 D None of these m MAUER 2m
- Q Block A shown in figure can slide over fixed rigid frictionless wire of quarter circular shape String connected to A and B is massless and inextensible System is released from...
- Q 43 A ball is released from the top of a high building from rest The average power delivered to the ball by the gravity in first second and third second...
- Q 2 An object of mass 500g initially at rest acted upon by a variable force whose X component varies with x in the manner shown The velocities of the object...
- Q 7 A force F k yi x where k is constant acts on a particle moving in the xy plane Starting from origin the particle is taken along y axis...
- Q Two plates of masses m and m are connected by a spring whose spring constant is k What force should be applied to the upper plate front to raise the...
- Q In a certain field the potential energy is U ax bx where a and b constants The particle is in stable equilibrium at x equal to 1 Zero 3 2a...
- Q 4 The potential energy between two atoms in a where a and b are positive constants and x is the distance between the atoms The atom is in stable equilibrium...
- Q A quarter horse power motor runs at a speed of 600 rpm Assuming 40 efficiency the wor done by the motor in one rotation will be a 7 46 J...
- Q An engine can pull 4 coaches at a maximum speed of 20 m s Mass of the engine is twice the mass of every coach Assuming resistive forces to be...
- Q Figure function of x for a particle moving along the x axis M abcd astel Consider the following statements A a c and d are points of equilibrium B a...
- Q A particle suspended by a light inextensible thread of length is projected horizontally from its lowest position with velocity 4g The particle will leave the circular path at a height...
- Q ustration 33 44 A 30000 kg air plane takes off at a speed of 50 m s and 5 min later it is at an elevation of 3 km v...
- Q 17 During the rocket propulsion gases ejecting with velocity 1 km s relative to rocket The rate of fuel m consumption is kg s where m is the 10 instantaneous...
- Q A force F 31 ci 2k acting on a particle causes a displacement d 41 2j 3k If the work c is 6J then the value of c is a...
- Q A thin circular rod is supported by a hinge at A Attached to point A is a spring of spring constant k and natural length equal to arc length AB...
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