According to principle of transmissibility of forces, the effect of a force upon a body is

The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

A

Same at every point on its line of action

B

Different at different points on its line of action

C

Minimum, if it acts at the center of gravity of the body

D

Maximum, if it acts at the center of gravity of the body

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)

A

$$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$

B

$$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$

C

$$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$

D

$$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$

If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

A

Change

B

Does not change

C

Changes periodically

D

None of these

In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if $$\frac{\omega }{{\omega {\text{n}}}}$$ is

A

Equal to 1

B

Equal to 2

C

Less than 2

D

Greater than 2

The transmissibility, for all values of damping factor, will be less than unity, if $$\frac{\omega }{{\omega {\text{n}}}}$$ is

A

Equal to 1

B

Less than 2

C

Equal to 2

D

Greater than 2

Dimensions of coefficient of transmissibility are

A

M°L°T°

B

M°L¹T^-1

C

M°L²T^-1

D

M°L³T^-1

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

A

30°

B

60°

C

90°

D

120°

A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

A

$$\frac{\tau }{2}$$

B

$$\tau $$

C

$$2\tau $$

D

$$4\tau $$

If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

A

P + ma = 0

B

P - ma = 0

C

P × ma = 0

D

$$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$

Effect of a force on a body depends upon

A

Magnitude

B

Direction

C

Position or line of action

D

All of the above

According to principle of transmissibility of forces, the effect of a force upon a body is

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