Locate the centroid of the exparabolic segment of area.

Question: For a self locking machine, the efficiency must be
[A].

equal to 50%

[B].

less than 50%

[C].

greater than 50%

[D].

100%

Answer: Option B

Explanation:

No answer description available for this question.

Question: A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m / s2 in the direction of which it acts.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: According to lami’s theorem
[A].

the three forces must be equal

[B].

the three forces must be at 120° to each other

[C].

the three forces must be in equilibrium

[D].

if the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two

Answer: Option D

Explanation:

No answer description available for this question.

Question: Efficiency of a screw jack is given by(where α = Helix angle, and φ = Angle of friction.)
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.