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Almas
Subject: Physics
, asked on 24/11/16
Two springs A and B having force constants Ka and Kb (Ka=2Kb) are stretched by applying forces of equal magnitudes. If the energy stored in B is E, then the energy stored in A is ?
Answer
3
Kushashwa Ravi Shrimali
Subject: Physics
, asked on 5/5/16
A ball of mass 10g collides perpendicularly on a smooth stationary wedge, of mass 2 kg. If the coefficient of restitution is 1/2, then find the velocity of the ball after collision,
(Given, angle of inclination of the wedge with horizontal is 30 degrees).
Answer
1
Ritesh Shrivas
Subject: Physics
, asked on 25/9/16
Prove that energy stored in oscillation spring remains same in oscillation.Plot graph between potential energy and kinetic energy with displacement of spring from their lean position and also prove that under free fall potential energy is converted in kinetic energy.
Answer
3
Abhishek Paul
Subject: Physics
, asked on 17/9/16
A body of mass m falls with a velocity u1 on a smooth wedge of mass M, which is moving with velocity u2 as shown in figure. The velocity of approach is- Ans- u1costheta + u2sintheta
Answer
1
Abhishek Paul
Subject: Physics
, asked on 16/9/16
A body of mass m is moving with velocity v , collides head on with another body of same mass at rest. If kinetic energy of the two bodies after collision is 3/4 of the original , find the co-efficient of restitution-
ans-
Answer
1
Anubhav Das
Subject: Physics
, asked on 11/9/16
how for a system h=1/2gt^2?
example no 1- chapter work energy and power- topic potential energy and conservation of mechanical energy...
Answer
1
Kshitij Sawhney
Subject: Physics
, asked on 10/9/16
vehicle of mass m is accelerated from rest when a constant power P is supplied by its engine. show that the position is given by s = (8P+9m)^1+2t^3+2
Answer
3
Keerthi Vasan
Subject: Physics
, asked on 9/9/16
find expression for final velocities when two bodies of same mass m have head on collision when moving in opposite directions with equal speeds... pls explain...
Answer
1
Ajit Kumar
Subject: Physics
, asked on 31/8/16
from the base of a hemisphere a right cone of height r/2 and same base has been snooped out.find the centre of mass of the remaining part
Answer
1
Anubhav Das
Subject: Physics
, asked on 25/8/16
restoring force setup by a string is given by F= -kx. my question is why the proportionality constant becomes negative?
Answer
1
Rutika Vitthal Marne.
Subject: Physics
, asked on 14/8/16
a system consists of two identical block each of mass m linked together by the compressed weightless spring of stiffness k, as shown in figure the blocks are connected by a thread which is burned through at a certain moment find to what height will the centre of gravity of this system will rise if the initial compression of the spring is 7 mg/k
Answer
1
Rutika Vitthal Marne.
Subject: Physics
, asked on 14/8/16
a small disc of mass m slides down a smooth hill of height h without initial velocity and gets onto a plank of mass M lying on a smooth horizontal plane at the base of hill due to friction between disc and plank disc slows down and finally moves as one piece with plank can it be stated that total work performed by the friction force does not depend on the choice of the reference frame.
Answer
1
Rutika Vitthal Marne.
Subject: Physics
, asked on 14/8/16
a rocket ejects a steady jet whose velocity is equal to u relative to the rocket the gas discharge rate is R kg/s .demonstrate that the the rocket motion equation in this case takes the form mw=F- Ru ,where m is the mass of the rocket at a given moment ,w is its acceleration ,and Fis the external force
Answer
1
Reema S Gera
Subject: Physics
, asked on 7/8/16
Will the exams of physcs , chemistry and maths be conducted seperately in boards. For how many marks will the exams be conducted?
Answer
1
Neha Jain
Subject: Physics
, asked on 5/9/16
a vehicle along with its driver has mass 600kgit is found that while moving up an inclined plane[sin(A)=1/20] at a speed of 30km/hr it consumes 50%more power compared to that while going down the plane with the same speed if the resistance offered by the plane is proportional to the speed of the vehicle ,find the resistance and power consumption while going up and down the inclined plane at a speed of 45km/hr
Answer
1
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What are you looking for?
(Given, angle of inclination of the wedge with horizontal is 30 degrees).
ans-
example no 1- chapter work energy and power- topic potential energy and conservation of mechanical energy...