# Applied Mechanics MCQ Test – Set 05

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## Q1. The centre of gravity of a triangle is at the point where three

(A) Medians of the triangle meet
(B) Perpendicular bisectors of the sides of the triangle meet
(C) Bisectors of the angle of the triangle meet
(D) None of these

Answer: (A) Medians of the triangle meet

## Q2. A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight

(A) Vertical component of velocity remains constant
(B) Horizontal component of velocity remains constant
(C) Speed of the ball remains constant
(D) Kinetic energy of the ball remains constant

Answer: (B) Horizontal component of velocity remains constant

(A) E
(B) E/2
(C) 2E
(D) 4E

## Q4. For perfectly elastic bodies, the value of coefficient of restitution is

(A) Zero
(B) 0.5
(C) 1.0
(D) Between 0 and 1

(A) 40 g
(B) 60 g
(C) 80 g
(D) 100 g

## Q6. A particle moving with a simple harmonic motion, attains its maximum velocity when it passes

(A) The extreme point of the oscillation
(B) Through the mean position
(C) Through a point at half amplitude
(D) None of these

Answer: (B) Through the mean position

(A) 15 m/sec
(B) 25 m/sec
(C) 40 m/sec
(D) 50 m/sec

## Q8. A satellite is said to move in a synchronous orbit if it moves at an altitude of 36,000 km with a maximum velocity of about

(A) 7000 km per hour
(B) 8000 km per hour
(C) 9000 km per hour
(D) 11,000 km per hour

Answer: (D) 11,000 km per hour

## Q9. Pick up the correct statement from the following:

(A) Nature plays an important role in the launch of a satellite
(B) The earth’s gravity reduces the speed of a satellite by 32 km per second
(C) The gravitational force relents as the satellite climbs higher
(D) All the above

## Q10. A retarding force on a body does not

(A) Change the motion of the body
(B) Retard the motion of the body
(C) Introduce the motion of the body
(D) None of these

Answer: (B) Retard the motion of the body

## Q11. A rigid body is in a stable equilibrium if the application of any force

(A) Can raise the CG of the body but cannot lower it
(B) Tends to lower the CG of the body
(C) Neither raises nor lowers the CG of the body
(D) None of above

Answer: (A) Can raise the CG of the body but cannot lower it

(A) 5 N
(B) 10 N
(C) 15 N
(D) 25 N

## Q13. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be

(A) 200 tonnes at the centre
(B) 500 tonnes at the centre
(C) 200 tonnes at the right support
(D) 200 tonnes at the left support

Answer: (B) 500 tonnes at the centre

(A) 1.6 t
(B) 9.6 t
(C) 8.5 t
(D) 0.5 t

(A) 1/4
(B) 1/3
(C) 3
(D) 4