Physics-
General
Easy
Question
If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: 
Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. Final velocity of the wedge is m/s :–
The correct answer is:
Related Questions to study
physics-
When two bodies collide normally, they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :– 
for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. For what values of J (in N–s) the 2 kg block will change its direction of velocity :
When two bodies collide normally, they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :– for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. For what values of J (in N–s) the 2 kg block will change its direction of velocity :
physics-General
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When two bodies collide normally, they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :– for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. If the collision is elastic, the value of J is N–s :
When two bodies collide normally, they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :– for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. If the collision is elastic, the value of J is N–s :
physics-General
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A police car moving at
, changes a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that he does not observe any beats.
A police car moving at, changes a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that he does not observe any beats.
physics-General
physics-
Figure here shown an incident pulse 
reflected from a rigid support. Which one of 
represents the reflected pulse correctly
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physics-General
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The tangent at the point P(x1, y1) to the parabola y2 = 4ax meets the parabola y2 = 4a(x + b) at Q and R, the coordinates of the mid-point of QR are
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maths-General
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If P (t2, 2t) t 
[0, 2] is an arbitrary point on parabola y2 = 4x. Q is foot of perpendicular from focus S on the tangent at P, then maximum area of 
PQS is-
If P (t2, 2t) t [0, 2] is an arbitrary point on parabola y2 = 4x. Q is foot of perpendicular from focus S on the tangent at P, then maximum area of PQS is-
maths-General
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The equation of the tangent to the parabola y = (x – 3)2 parallel to the chord joining the points (3, 0) and (4, 1) is-
The equation of the tangent to the parabola y = (x – 3)2 parallel to the chord joining the points (3, 0) and (4, 1) is-
maths-General
maths-
If a 
0 and the line 2bx + 3cy + 4d = 0 passes through the points of intersection of the parabolas y2 = 4ax and x2 = 4ay, then
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The P be the family of parabolas y = x2 + px + q (q ≠ 0) whose graphs cut the axes in three points. The family of circles through these three points have a common point
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maths-General
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Consider the two curves C1 : y2 = 4xC2 : x2 + y2 – 6x + 1 = 0Then,
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Maths-General
chemistry-
A complex involving 
-hybridization is:
A complex involving -hybridization is:
chemistry-General
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An engine approaches a hill with a constant speed. When it is at a distance of 
it blows a whistle, whose echo is heard by the driver after 
If speed of sound in air is 
the speed of engine is
An engine approaches a hill with a constant speed. When it is at a distance of it blows a whistle, whose echo is heard by the driver after If speed of sound in air is the speed of engine is
physics-General
physics-
Two strings 
and 
of a sitar produce a beat frequency 
When the tension of the string is slightly increased the beat frequency is found to be 
If the frequency of is 
then the original frequency of was
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physics-General
chemistry-
I.U.P.A.C name of 
is:
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chemistry-General
Maths-
The equation of the directrix of the parabola y2 + 4y + 4x + 2 = 0 is-
The equation of the directrix of the parabola y2 + 4y + 4x + 2 = 0 is-
Maths-General
