Curved surface

Convex surface

Horizontal surface

None of these

C. Horizontal surface

n

n²

2n

2n - 1

W sinθ

W cosθ

W tanθ

W cotθ

πN/60

πN/180

2πN/60

2πN/180

tanθ = ΣH/ΣV

tanθ = ΣV/ΣH

tanθ = ΣV × ΣH

tanθ = √(ΣV + ΣH)

Two times

Same

Half

None of these

Downward at its upper end

Upward at its upper end

Zero at its upper end

Perpendicular to the wall at its upper end

Along the plane

Horizontally

Vertically

At an angle equal to the angle of friction to the inclined plane

Potential energy

Kinetic energy

Electrical energy

Chemical energy

If a system of coplanar forces is in equilibrium, then their algebraic sum is zero

If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point

Positive and negative couples can be balanced

P/2

2P

√2 × P

P/√2

Magnitude

Direction

Point of application

All of the above

Zero

Minimum

Maximum

None of these

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 particle 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 other two

One point

One plane

Different planes

Perpendicular planes

g/2

g

√2.g

2g

Balance each other

Cannot balance each other

Produce moment of a couple

Are equivalent

Impulsive force

Mass

Weight

Momentum

Mass

Volume

Density

Acceleration

Momentum and impulse

Torque and energy

Torque and work

Moment of a force and angular momentum.

tan(α + φ)/tanα

tanα/tan (α + φ)

tan(α - φ)/tanα

None of these

W between P and F

F between W and P

P between W and F

W, P and F all on one side

v

v/2

v/4

v/8

Reversible

Non-reversible

Ideal

None of these

Is the turning effect produced by a force, on the body, on which it acts

Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force

Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken

All of the above

Angle of friction

Angle of repose

Angle of banking

None of these

Nature of surfaces

Area of contact

Shape of the surfaces

All of the above

Change its motion

Balance the forces, already acting on it

Give rise to the internal stresses in it

All of these

R = u² cos2α/g

R = u² sin2α/g

R = u² cosα/g

R = u² sinα/g

Reducing the problem of kinetics to equivalent statics problem

Determining stresses in the truss

Stability of floating bodies

Designing safe structures

15 N and 5 N

20 N and 5 N

15 N and 15 N

None of these