DC PANDEY MECHANICS PDF

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there will be change in velocity and so acceleration. (b) (i) No. In curved path there will always Understanding Physics: Mechanics, Part 1 (chapters ). mechanics mencosulwiemudd.gq Can you provide D.C. Pandey's Mechanics Part-1 (PDF)?. 10, Views · How can I download a PDF file of DC Pandey Physics Part 1?. dc Pandey physics mechanics part 2 PDF is the best book ever for a Serious IIT-JEE (Main, Advance) & Medical Student. DC Pandey all physics series enhance and motivates you for solving problems from any book after completing dc Pandey 5 set of books. I want to tell all the.

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D.C. Pandey. · Rating details · 1, ratings · 53 reviews. •Detailed “theory” is given with the figures to understand the topic well. •“Sample examples” are. DC Pandey (M2) - Free download as PDF File .pdf), Text File .txt) or read online for free. This is solutions for DC Pandey Mechanics-II. Please don't circulate. DC Pandey Mechanics Part 1 Solutions PDF - Ebook download as PDF File .pdf) , Text File .txt) or read book online. its comple solution of DC Pandey.

At maximum acceleration value of a. Increasing from zero when F attains 6 N. The system will be in equilibrium. Option c is incorrect.. Maximum value of friction available to block is less than the maximum value of friction available to man. See solution to Question no. Maximum value of friction.

After that. All contact forces e. Between two protons field force also acts. If the body is at the point of slipping the force of force will be limiting too. Force of friction will be in the upward direction. Block would be slipping in the downward direction.

Laws of Motion 7. Energy and Power Introductory Exercise 6. A goes down byx. False b As some negative work will be done by Mg. Energy and Power 2 4. In Fig. Spring get extended by x. True d Work done by gravity will be negative Ans. False Introductory Exercise 6. The value of T must be greater that Mg. When block of man M goes down by x. For U to be minimum.

Conservative force field and Potential Energy. Energy and Power For 45 kg mass to drop 12 mm. On a body placed on a rough surface if an external force is applied the static body does not move then the work done by frictional force will be zero. Energy and Power 2. KE of 12 kg mass: KE of 6 kg mass 1 1 m12v2: While ball comes down t0 O t Fig.

Let x be the elongation in the spring. Net work done Work done by normal force is zero.

Due to inertia the spring will not start compressing the moment the block just touches the spring and as such the block will still be in the process as increasing its KE. Energy and Power 1 Thus v of the block will be maximum when it compresses the spring by some amount. Assertion is false. According to 2nd low of motion. Conservative force has nothing to do with kinetic energy. If a non-conservative force acts on a particles.

Assertion is true and also as explained above reason besides being true is the correct explanation for the Assertion. In circular motion only the work done by 1. Assertion is true. A The centripetal force is zero. Work done by conservative force decreases PE reason is true.

As displacement is opposite to force reason the work done by force will be negative. Work done by constant force F when the body shifts from A to B. When block is depressed the excess of upthrust force will act as restoring force and will bring the block up. Kinetic frictional force remains constant but is a non-conservative force.

Reason also being the correct explanation of the assertion. When the block comes down the wedge. The Reason is false.

Work done by all the forces is equal to change in KE is as per work-energy theorem. The work done by the force F will be used up in doing work against friction f2 and also increasing the elastic potential energy of the cord.

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The velocity gained by block will take the block above its equilibrium and the block will oscillate about its equilibrium position as given in reason. Earth is non-inertial which is also true is a separate issue and has nothing to do with the assertion. It will along AB as shown in figure. There will be increase in length of the elastic cord. It is true that work-energy theorem can be applied to non-inertial frame also as explained in the answer to question no.

As explained above the reason is false. In this case the mechanical energy is being used up in doing work against friction and in increasing the PE of the block. It means KX i becomes zero. Let x be the expansion in the spring. Energy and Power m 4. Downward acceleration. C is point of stable equilibrium. Energy and Power i.

Acceleration of the block will decrease as the block moves to the right and spring expands the velocity v of block will be maximum.

Ui at 1. KE of the block will be maximum when it is just at the point of touching the plank and at this moment there would no compression in the spring. Energy and Power At this moment. Particle can't be found in the regions above PE max line. Options c and d are incorrect. Option d.

If the 2 extended spring is released the energy stored in the spring will be lost when the spring attains its natural length. When the spring attains to natural length. Correct option is a obviously being incorrect. Total work done by internal forces of a mg system. At maximum extension x: Correct option is b. Correct option is c. Energy and Power Option b is correct. During motion of an object along a curved path the speed and magnitude of its radial acceleration may remain constant.

Due to change in direction of motion the velocity of the object will change even if its speed is constant. In uniform circular motion of a body the a At rest: Circular Motion Introductory Exercise 7. Ball motion from A to B: If the driver tries to stop the vehicle by applying breaks. Circular Motion The block will be at he point of slipping.

If the block just leaves the surface of From above question no. A frame moving in a circle with constant speed can never be an inertial frame as the frame is not moving with constant velocity due to change in direction. In circular motion. Reason that the frame is having constant acceleration is false. For stopping car: Let all the particles meet at time t seconds B 2.

Assertion and Reason are both correct and Reason is the correct explanation of the Assertion. At points A and C: Reason is also true but not the correct explanation of the assertion.

Both Assertion and the Reason are correct but reason has nothing to do with the assertion. As assertion and reason both are true and reason is the correct explanation of the assertion of the option would be a.

In circular motion the acceleration changes regularly where as in projectile motion it is constant. Acceleration is not along the surface of the funnel. It is along the centre O of the circle. As speed can be changed linearly with time.

At point B: Velocity is completely horizontal and as such its vertical component will again be zero.

Change in PE of the system m M. Maximum and minimum velocities will be. At point D: At point B:. Thus, if h is increase, T will increase. A Acceleration of bob: Tension in string: Tangential acceleration of bob: If v is increased F will increase which will automatically increase the value of f.

Speed of particle is constant. As the centripetal force F would be provided by the frictional force f. Conservation of Linear Momentum. As more mass is towards base. If two equal masses are kept at co-ordinates R. Centre of Mass. In zero gravitational field CG has no meaning while CM still exists.

Centre of mass always lies on the axis of symmetry of the body. Impulse and Collision 8 Introductory Exercise 8.

The CM of a solid uniform sphere is at its centre. The centre of mass of a rigid body may lie inside. If a body is placed in a uniform gravitational field.

The CM of a solid ring is at the centre of the ring which lies outside the mass of the body thus. Statement is true. As no external force acts on the system of particles. Impulse and Collision Introductory Exercise 8. At point P Spring will become taut when the ball would go down by 2 m. Mass at time t. At maximum extension of the spring both blocks will move with same velocity v.

Let us consider the following case of 4. In elastic collision of two bodies of equal masses. Centre of Mass.. Conservation of Linear Momentum C is CM.

L O As no external force acts on the system. While man travels from P to Q or Negative sign shows that the balloon will move downwards. Force applied by man to gain velocity to climb up is an internal force and as such the velocity of the CM of the system will remain stationary.

Let the track shift by x to the right when the cylinder reaches the bottom of the track. No change in momentum of ball and also that of wall along horizontal direction.

Let us consider right direction as positive. Impulse and Collision External force acting on the cannon shell before explosion is the gravitational force. Momentum remains conserved.. While colliding the balls will apply equal and opposite impulsive force on each other. Let us consider a system of two masses as shown in figure.

The forces acting on the blocks would be equal and opposite as per Newton's 3rd law of motion. Option a If collision is inelastic. Accelerations being different velocities will be unequal. Decrease in momentum of the ball is transferred to sand while KE does not remain conserved as it gets used up in doing work against friction. Change in momentum of the system will definitely be due to external gravitational forces on the balls but as the time of impact shall be very less the impulsive force will over shadow the weak gravitational force.

M1 F F M2 Option c is correct. Impulsive forces will change the momentum of the balls but the total momentum of the system of 2 balls will remain conserved impulsive forces being internal ones.

Horizontal velocity of the leaving coal: Velocity of ball before first impact i. Conservation of Linear Momentum.. As there is no net external force acting on the system in the horizontal direction. As discussed in the answer to previous question no.

As no net extra external force is acting on the system the CM of the gun and the bullet system remains at rest. The force exerted by the trigger of the gun on the bullet is an interval one. Velocity of water after striking the plate would be almost zero as then it flows parallel to the plate. B or velocity of B w.

Velocity of separation would be zero as the collision is completely inelastic. The shell explodes at A. As the CM will not change along x-axis. As explained in the answer to question no. It is correct that centre of mass and centre of gravity of a body coincide if the body is placed in a uniform gravitational field.

Centre of mass of the rigid body of uniform thickness as shown in figure would be at point P which is neither outside nor inside.

The CM of a uniform sphere is at its centre. To answer this question. The centre of mass of a uniform plate lies at its centre. As no net external force is acting there on the system along horizontal direction the momentum of the system remains conserved along horizontal direction but as gravitational force a net external force acts on block in the vertical direction downwards the momentum of the system does not remain constant along vertical direction.

If two blocks connected by a spring placed on a smooth surface are stretched apart the internal restoring forces acting on blocks will definitely increase the KE of the system but this argument under Reason has nothing to do with the nothing under Assertion that internal forces can't change linear momentum.

In any collision. Inside a system internal forces are always in pairs and as such can't change linear momentum. Reason is false. When bullet is fired and comes out of the gun. As overall momentum of the system does not remain constant. As per assertion if force is applied on a system the linear momentum of the system must not remain conserved. As KE is inversely proportional to mass. Assertion is false as for example heat energy can be given to a system without any increase in momentum of the system while KE given to a system increases its momentum.

Option would be a. Reason is true as explained in the answer to question no. Linear momentum of a system remains conserved when no net external force acts on the system i. As wedge is at rest.

Assertion is false as explained in the answer to question no. In every type of collision the linear momentum of the system remains conserved. As no external force would be acting on the system of electron and proton along the line joining electron and proton the CM of electron and proton will remain at rest.

As no force is acting on the system along horizontal. As the collisions of the striker and the walls of the carrom are perfectly elastic the striker will follow the path OPQROP. As the resultant of the velocities of 1st and 2nd are just opposite to that of 3rd. Motion of A: As the masses are equal and the collision is elastic. Block is now at rest for the second time.

Impulse given to the block will also release it from abstraction besides giving and then imparting the restoring force on it due to velocity to it 5cm of the spring expansion will accelerate it.

Compression in spring Velocity gained by block when the spring is at its natural length will compress the spring. Block at rest first time due to some reason. Let x be the displacement of rod. Along vertical: When the spider eats up the moth and v relative 2 travels towards A with velocity to rod. As no force acts along horizontal direction.

As the block comes down. Impulse and Collision 5. As the mass of the system keeps on Option c is correct. Velocity of B after collision: After this A will start compressing the spring and at a certain instant when the spring is compressed to maximum value both the blocks will travel towards right with a constant velocity and then the velocity of CM will become constant.

As both travel towards right the velocity of CM will be maximum in the beginning. If x0 is the compression made in the spring. When the spring gets compressed to its maximum both the blocks will have the same velocities i. If collision is elastic. Centre of mass of the system will move downward if man moves downward. Flag for inappropriate content.

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