Physics-
General
Easy
Question
A block A is placed over a long rough plank B of same mass as shown in figure. The plank is placed over a smooth horizontal surface. At time t=0, block A is given a velocity v0 in horizontal direction. Let
and
be the velocities of A and B at time t. Then choose the correct graph between
or
and t





The correct answer is: 
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Three blocks A , B and C of equal mass m are placed one over the other on a smooth horizontal ground as shown in figure. Coefficient of friction between any two blocks of A,B and C is
The maximum value of mass of block D so that the blocks A, B and C move without slipping over each other is

Three blocks A , B and C of equal mass m are placed one over the other on a smooth horizontal ground as shown in figure. Coefficient of friction between any two blocks of A,B and C is
The maximum value of mass of block D so that the blocks A, B and C move without slipping over each other is

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For the system shown in the figure, the acceleration of the mass m4 immediately after the lower thread x is cut will be, (assume that the threads are weightless and inextensible, the spring are weightless, the mass of pulley is negligible and there is no friction)

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Given
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is equal to:
is equal to:
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and
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tan
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For a certain mass of a gas Isothermal relation between ‘P’ and ‘V’ are shown by the graphs at two different temperatures T1 and T2 then

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is equal to
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and
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+
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P(a cos
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Given graph gives variation of
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with P for 1gm of oxygen at two different temperatures T1 and T2. If density of oxygen
The value of
at point A and relation 

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The limiting value of (cos x)1/sin x as x → 0 is :
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