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Physics-

General

Easy

Question

Block ‘A‘ is hanging from a vertical spring and is at rest. Block ‘B‘ strikes the block ‘A’ with velocity ‘v‘ and sticks to it. Then the value of ‘ v ‘ for which the spring just attains natural length is

$\sqrt{\frac{60 {m g}^{2}}{k}}$
$\sqrt{\frac{6 {m g}^{2}}{k}}$
$\sqrt{\frac{10 {m g}^{2}}{k}}$
none of these

The correct answer is: $square root of fraction numerator 6 m g to the power of 2 end exponent over denominator k end fraction end root$

Related Questions to study

Statement 1:Sound waves cannot propagate through vacuum but light waves can
Statement 2:Sound waves cannot be polarised but light waves can be polarized

Statement 1:Sound waves cannot propagate through vacuum but light waves can
Statement 2:Sound waves cannot be polarised but light waves can be polarized

physics-General

Straight line $ell$ x + my + n = 0 touches parabola y² = 4ax if $ell$ n = am^k then k =

Straight line $ell$ x + my + n = 0 touches parabola y² = 4ax if $ell$ n = am^k then k =

If $ell$ ₁ & $ell$ ₂ are length of segments of focal chord of parabola y² = 4ax than harmonic mean of $ell$ ₁ & $ell$ ₂ is equal to

If $ell$ ₁ & $ell$ ₂ are length of segments of focal chord of parabola y² = 4ax than harmonic mean of $ell$ ₁ & $ell$ ₂ is equal to

parallel

Four similar point masses (each of mass m) are placed on the circumference of a disc of mass M and radius R. The M.I. of the system about the normal axis through the centre O will be:-

Four similar point masses (each of mass m) are placed on the circumference of a disc of mass M and radius R. The M.I. of the system about the normal axis through the centre O will be:-

physics-General

We have a rectangular slab of same thickness. E, F, G, H are the middle point of AB, BC, CD and AD respectively then which of the following axis the moment of inertia will be minimum :–

We have a rectangular slab of same thickness. E, F, G, H are the middle point of AB, BC, CD and AD respectively then which of the following axis the moment of inertia will be minimum :–

physics-General

Angle between tangents drawn from (1, 4) to parabola y² = 4x is

Angle between tangents drawn from (1, 4) to parabola y² = 4x is

parallel

Let y² = 4ax be parabola and PQ be a focal chord of parabola. Let T be the point of intersection of tangents at P and Q. Then

Let y² = 4ax be parabola and PQ be a focal chord of parabola. Let T be the point of intersection of tangents at P and Q. Then

If the line 2x – 1 = 0 is the derectrix of the parabola y² – kx + 6 = 0 then one of the value of K is -

If the line 2x – 1 = 0 is the derectrix of the parabola y² – kx + 6 = 0 then one of the value of K is -

If a double ordinate of the parabola y² = 4ax be of length 8a, then the angle between the lines joining the vertex of the parabola to the ends of this double ordinate is

If a double ordinate of the parabola y² = 4ax be of length 8a, then the angle between the lines joining the vertex of the parabola to the ends of this double ordinate is

parallel

Tangents are drawn from a point P to the parabola y² = 8x such that the slope of one tangent is twice the slope of other. The locus of P is

Tangents are drawn from a point P to the parabola y² = 8x such that the slope of one tangent is twice the slope of other. The locus of P is

In the adjoining figure along which axis the moment of inertia of the triangular lamina will be maximum- [Given that $A B less than B C less than A C right square bracket$

In the adjoining figure along which axis the moment of inertia of the triangular lamina will be maximum- [Given that $A B less than B C less than A C right square bracket$

physics-General

Three particles, each of mass m are situated at the vertices of an equilateral triangle ABC of side $lambda$ cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram $c m to the power of 2 end exponent$ units will be :

Three particles, each of mass m are situated at the vertices of an equilateral triangle ABC of side $lambda$ cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram $c m to the power of 2 end exponent$ units will be :

physics-General

parallel

The locus of the middle points of chords of a parabola which subtend a right angle at the vertex of the parabola is

The locus of the middle points of chords of a parabola which subtend a right angle at the vertex of the parabola is

If the parabola y² = 4ax passes through (3, 2), then length of latus rectum of the parabola is

If the parabola y² = 4ax passes through (3, 2), then length of latus rectum of the parabola is

The locus of the poles of focal chord of the parabola y² = 4ax is

The locus of the poles of focal chord of the parabola y² = 4ax is

parallel

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