A block of mass m slides down a wedge of mass m as shown. The whole system is at rest, when the height of the block is h = 10 m. Above the ground. The wedge surface is smooth and gradually flattens. There is no friction between wedge and ground. As the block slides down, which of the following quantities associated with the system remains conserved?

STATEMENT-1 : One end of ideal massless spring is connected to fixed vertical wall and other end to a block of mass m initially at rest on smooth horizontal surface. The spring is initially in natural length. Now a horizontal force F acts on block as shown. Then the maximum extension in spring is equal to maximum compression in spring.

STATEMENT-2 : To compress and to expand an ideal unstretched spring by equal amount, same work is to be done on spring

Statement I : Trace of matrix  A =  is equal to a₁₁ + a₂₂ + a₃₃
Statement II : Trace of a matrix is equal to sum of its diagonal elements.

The trace has several properties that are used to prove important results in matrix algebra and its applications.
 Let A and B be two K X K matrices. Then,

Statement I : The inverse of the matrix A    does not exist.
Statement II : |A|   .

the focus of parabola (y – k)² = 4 (x – h) always lies between the line x + y = 1 and x + y = 3 then  -

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

The value of 'λ' such that vertex of parabola y = x² + 2λx + 13 is 4 unit above x axis & lies in first quadrant is

PSQ is a focal chord of a parabola whose focus is S & vertex A . PA and QA are produced to meet the directrix in R and T respectively then 

In the figure shown initially spring is in unstretched state & blocks are at rest. Now 100 N force is applied on block A & B as shown in the figure. After some time velocity of 'A' becomes 2 m/s & that of 'B' is 4 m/s & block A displaced by amount 10 cm and spring is stretched by amount 30 cm. Then work done by spring (in joule) force on A will be

In the figure, the ball A is released from rest when the spring is at its natural length. For the block B, of mass M to leave contact with the ground at some stage, the minimum mass of A must be:

In the track shown in figure section AB is a quadrant of a circle of 1 metre radius. A block is released at A and slides without friction until it reaches B. After B it moves on a rough horizontal floor and comes to rest at distance 3 metres from B. What is the coefficient of friction between floor and body ?

A particle of mass m moving along a straight line experiences force F which varies with the distance x travelled as shown in the figure. If the velocity of the particle at x0 is , then velocity at 4 is:-

Power versus time graph for a given force is given below. Work done by the force up to time t(£ t0 )

A particle A of mass is moving in the positive direction of x. Its initial position is x = 0 & initial velocity is 1 m/s. The velocity at x = 10 is in m/s (use the graph given)

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

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