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WorksheetsComputational Mechanics
Total questions: 10
Worksheet time: 6mins
For a particle in plane to be in equlibrium
1. Sum of the forces along X-direction is zero.
2. Sum of the forces along Y-direction is zero.
3. Sum of the moments of all the forces about any point is zero.
Which of the above mentioned statements are always correct?
1 & 2
1 & 3
2 & 3
1, 2 & 3
At a point A in a plane there is a vertical upward force of 2 N and a clockwise couple of 4 Nm. These are equivalent to a single vertical force of 2 N at a point B. The distance of point B from Point A is
1 m to the left
2 m to the left
1 m to the right
2 m to the right
A 50 kg block rests on a 20 deg plane as shown in figure. Coefficient of friction is 0.40. Maximum horizontal force, P that can be applied to the block without causing it to slide.
439 N
495 N
78.52 N
139.2 N
Effect of a force on a body depends upon
Direction
Magnitude
Position or Line of action
All of the above
If a number of forces act simultaneously on a particle, it is possible
to replace them by a single force
to replace them by a single force through C.G.
to replace them by a couple
to replace them by a couple and a force.
Which of the following is not a scalar quantity
Time
mass
acceleration
Density
According to principle of transmissibility of forces, the effect of a force upon a body is
maximum when it acts at the center of gravity of a body
same at every point in its line of action
different at different points in its line of action
minimum when it acts at the C.G. of the body
According to law of triangle of forces
three forces acting at a point will be in equilibrium
three forces acting at a point can be represented by a triangle, each side being proportional to force
if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order,they will be in equilibrium
if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the othertwo
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
the floor is smooth, the wall is rough
the floor is rough, the wall is smooth
the floor and wall both are rough surfaces
the floor and wall both are smooth surfaces
The product of the force of couple with the arm of the couple is called
resultant couple
moment of the forces
moment of the couple
resulting couple
