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1.
Two blocks are connected by a string as shown in the diagram. The upper block is hung by another string. A force 
applied on the upper string produces an acceleration of 
in the upward direction in both the blocks. If 
and 
be the tensions in the two parts of the string, then 
applied on the upper string produces an acceleration of in the upward direction in both the blocks. If and be the tensions in the two parts of the string, then
2.
The acceleration of the 500 g block in figure is
3.
If in a stationary lift, a man is standing with a bucket full of water, having a hole at its bottom. The rate of flow of water through this hole is 
. If the lift starts to move up and down with same acceleration and then that rates of flow of water are 
and 
, then
. If the lift starts to move up and down with same acceleration and then that rates of flow of water are and , then
4.
A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The friction between wall and body is 0.3. Then the frictional force is equal to
5.
A blumb bob is hung from the ceiling of a train compartment. The train moves on an inclined track of inclination 30
with horizontal. Acceleration of train up the plane is 
. The angle which the string supporting the bob makes with normal to the ceiling in equilibrium is
with horizontal. Acceleration of train up the plane is . The angle which the string supporting the bob makes with normal to the ceiling in equilibrium is
6.
Which of the following quantities measured from different inertial reference frames are same?
7.
A block of mass '
' is connected to another block of mass '
' by a spring (massless) of spring constant '
'. The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force '' starts acting on the block of mass '' to pull it. Find the force on the block of mass ''
' is connected to another block of mass '' by a spring (massless) of spring constant ''. The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force '' starts acting on the block of mass '' to pull it. Find the force on the block of mass ''
8.
A block is kept on an inclined plane of inclination 
and length 
The velocity of particle at the bottom of incline is (the coefficient of friction is 
)
and length The velocity of particle at the bottom of incline is (the coefficient of friction is )
9.
The engine of a jet aircraft applies a thrust force of 
during take off and causes the plane to attain a velocity of 
in 
. The mass of the plane is
during take off and causes the plane to attain a velocity of in . The mass of the plane is
10.
The sum of the magnitudes of two forces acting at a point is 18 N and the magnitude of their resultant is 12 N. If the resultant is at 
with the smaller force, the magnitude of the forces in N are
with the smaller force, the magnitude of the forces in N are