Civil Engineering :: Applied Mechanics
-
When a body of mass M1 is hanging freely and an other of mass M2 lying on a smooth inclined plane(α) are connected by a light indextensible string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by
-
According to Law of Triangle of Forces
-
A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length
-
The following is not a law of static friction :
-
The velocity of a moving body, is
-
A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be
-
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is
-
The velocity ratio of the differential wheel and axle is
-
The following statement is one of the laws of Dynamic friction
-
A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately
Whatsapp
Facebook
|
A.
three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force |
|
B.
three forces acting along the sides of a triangle are always in equilibrium |
|
C.
if three forces acting on a, point can be represented.in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium |
|
D.
if three forces acting at a point are in equilibrium each force is proportional to the sine of the angle between the other two |
|
E.
if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order. |
|
A.
The force of friction always acts in a direction opposite to that in which the body tends to move |
|
B.
The force of friction is dependent upon the area of contact |
|
C.
The force of friction depends upon the roughness of the surface |
|
D.
The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces. |
|
A.
The force of friction always acts in a direction opposite to that in which a body is moving |
|
B.
The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction |
|
C.
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed |
|
D.
all the above. |