If ? and u are the angle of projection and initial velocity of a projectile resp

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If ? and u are the angle of projection and initial velocity of a projectile respectively, the horizontal range of the projectile, is
Options
A.
B.
C.
D.

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3. A body is said to move with Simple Harmonic Motion if its acceleration, is
Options
A. always directed away from the centre, the point of reference
B. proportional to the square of the distance from the point of reference
C. proportional to the distance from the point of reference and directed towards it
D. inversely proportion to the distance from the point of reference
E. none of these.

4. If the angle between the applied force and the direction of motion of a body, is between 90� and 180�, the work done, is called
Options
A. virtual work
B. imaginary work
C. zero work
D. negative work.

5. Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,
Options
A. dip of the cable increases
B. length of the cable increases
C. dip of the cable decreases
D. none of the these.

6. A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45� and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
Options
A. 0.5 m/sec
B. 1.5 m/sec
C. 2.5 m/sec
D. 3.5 m/sec
E. 4.5 m/sec.

8. Pick up the correct statement from the following for the structure shown in below figure.
Options
A. The horizontal reaction at A is 23t ?
B. The horizontal reaction at C is 23t ?
C. The vertical reaction at A is zero
D. The vertical reaction at C is 2 t ?
E. All the above.

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