Engineering Mechanics - Mechanical Engineering Questions and Answers

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Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

Yes

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Moment of inertia of a circular section about an axis perpendicular to the section is

πd³/16

πd³/32

πd⁴/32

πd⁴/64

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The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, Î± = Angle of projection, and Î² = Inclination of the plane with the horizontal.)

t = \( \frac {g cos\beta} { 2u sin(\alpha - \beta) } \)

t = \( \frac {2u sin(\alpha - \beta)} { g cos\beta } \)

t = \( \frac {g cos\beta} { 2u sin(\alpha + \beta) } \)

t = \( \frac {2u sin(\alpha + \beta)} { g cos\beta } \)

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The unit of angular acceleration is

N-m

m/s

m/s²

rad/s²