Statics and Dynamics Test

Result

Statics and Dynamics Test - 7

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Weekly Quiz Competition

Question 1
4 / -1

Let ABC be an equilateral triangle formed by weightless inextensible strings, the side AB is horizontal. A and B are tied to fixed points D and E by equal weightless inextensible strings AD, BE, a weight of W gram is attached at C. The angles DAB, ABE are each 150°. Then,which of the following statements is correct?

A
The tensions in the strings AB, BC and CA are equal

B
The tensions in the strings BE, AD are inversely proportional

C
The tension in BE is less than the tension in AB

D
The tension in AD is twice the tension in BC

Solution
Question 2
4 / -1

The maximum and minimum magnitude of resultants of two forces are P₁ and P₂ , respectively. The magnitude of the resultant, when two forces are at a right angles, is

A

B

C

D

Solution
Question 3
4 / -1

A
60°

B
120°

C
90°

D
150°

Solution
Question 4
4 / -1

The greatest and the least magnitudes of the resultant of two forces of constant magnitudes are F and G . When the forces act at an angle 2α , the magnitude of the resultant is

A

B

C

D
Question 5
4 / -1

A

B

C

D
Question 6
4 / -1

A

B

C
4 P

D
None of these
Question 7
4 / -1

If forces of magnitudes 12 kg-W, 5 kg-W and 13 kg-W act at a point are in equilibrium, then the angle between the first two forces is

A
30°

B
90°

C
60°

D
45°
Question 8
4 / -1

With two forces acting at a point, the maximum effect is obtained when their resultant is 4 N. If they act at right angles, then their resultant is 3N. Then, the forces are

A

B

C

D
Question 9
4 / -1

The resultant R of two forces P and Q act at right angles to P. Then, the angle between the forces is

A

B

C

D
Question 10
4 / -1

The resultant R of two forces acting on a particle is at right angles to one of them and its magnitude is one-third of the other force. The ratio of larger force to smaller one is

A

B
3 : 2

C

D
2 : 1