 A. 6t² – 8t
 B. 3t² + 2t
 C. 6f – 8
 D. 6f – 4
Engineering Mechanics

A particle moves along a straight line such that distance (x) traversed in ‘t’ seconds is given by x = t² (t – 4), the acceleration of the particle will be given by the equation_____.

The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by_____.
 A. 2P sinθ/2
 B. 2P cosθ/2
 C. 2P tanθ/2
 D. 2P cotθ/2

The necessary condition for forces to be in equilibrium is that these should be_____.
 A. Coplanar
 B. Meet at one point
 C. Both (A) and (B) above
 D. All be equal

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is _____ than that passing through its C.G. and parallel to the base.
 A. Nine times
 B. Six times
 C. Four times
 D. Two times

Two blocks ‘A’ and ‘B’ of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings _____ be same.
 A. Will
 B. Will not
 C. Either A or B
 D. None of these

When two elastic bodies collide with each other,_____.
 A. The two bodies will momentarily come to rest after collision
 B. The two bodies tend to compress and deform at the surface of contact
 C. The two bodies begin to regain their original shape
 D. All of the above

The acceleration of a particle moving with simple harmonic motion is _____ at the mean position.
 A. Zero
 B. Minimum
 C. Maximum
 D. None of these

A framed structure is perfect, if the number of members are _____ (2j – 3), where j is the number of joints.
 A. Equal to
 B. Less than
 C. Greater than
 D. None of these

The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.).
 A. ω/2π
 B. 2π/ω
 C. 2π × ω
 D. π/ω

The term ‘Centroid’ is_____.
 A. The same as centre of gravity
 B. The point of suspension
 C. The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
 D. None of the above