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9th Class Physics Chapter 4 Turning Effect of Forces English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Perpendicular / hypotenuse is equal to:
Choose an answer
Cos
θ
Tan
θ
Cosec
θ
Sin
θ
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Question # 2
The angle between rectangular components of a vector is
Choose an answer
0°
90°
180°
270°
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Question # 3
The centre of gravity of uniform triangle is:
Choose an answer
Point of intersection of medians
On its vertex
On middle point of its axis
Point of intersection of diagonal
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Question # 4
The parallel forces which have same direction are called.
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Resutant force
Like parallel force
Unlike force
Null force
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Question # 5
When center of gravity is at the highest position body will be in:
Choose an answer
Neutral equilibrium
Stable equilibrium
Unstable equilibrium
None of these
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Question # 6
Resultant vector can be found by:
Choose an answer
θ=tan
-1
Fy/ Fx
θ=tan
[
Fy/ Fx ]
θ=tan
-1
[ Fy/ Fj ]
None of these
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Question # 7
Consider a rigid body. As it rotates, its particles move in fixed
Choose an answer
Squares
Circles
Triangles
Rectnagles
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Question # 8
The product of force and momentum arm is called:
Choose an answer
Couple arm
Torque
Rigid body
Axis of rotation
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Question # 9
The net torque acting on a rotating body with uniform speed is:
Choose an answer
0
1
2
5
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Question # 10
Unit of moment arm (L) is:
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Meter
Mole
Newton
Nm
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Question # 11
Two equal but unlike parallel forces having different lines of action produce:
Choose an answer
a Torque
a couple
Equilibrium
Netural equilibrium
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Question # 12
A couple consists of how many forces:
Choose an answer
1
2
3
4
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