Home 9th Class Physics Notes Turning effect of Forces: 9th Class Physics Chapter 4 MCQs

# Turning effect of Forces: 9th Class Physics Chapter 4 MCQs

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In this post, I am sharing 9th Class Physics Chapter 4 MCQs for students as a quiz. So, if you have reached here looking for 9th Class Physics Notes of 4th Chapter, you are at the exact post. Chapterwise 9th Class Physics MCQs are also available, so you could reach notes of all chapters. Turning Effect of Forces is the name of 4th Chapter in Class 9 Physics book. I have taken these Class 9 physics Chapter 4 MCQs with Answers from  Al-Hassan Super Notes Physics (English Medium) – IX.. Students can practice these Multiple Choice Questions before participating exams.

## Turning effect of Forces: 9th Class Physics Chapter 4 MCQs for Students

You should also visit: 9th Class Physics Chapter 4 Short Questions and Answers

(a) 1
(b) 3
(c) 4
(d) 2

(d) 2

(a) 4N
(b) 5N
(c) 7N
(d) 8.7N

(d) 8.7N

#### 3. Turning effect of a force is called:

(a) Torque
(b) Moment
(c) Couple
(d) Torque and momentum

(a) Torque

(a) 7N
(b) 5N
(c) 12N
(d) 10N

(b) 5N

#### 5. First condition of equilibrium is:

(a) ΣF = 0
(b) Στ = 0
(c) ΣF = 0, Στ = 0
(d) All of These

(a) ΣF = 0

#### 6. Center of gravity of sphere is at:

(a) Centre of sphere
(b) Outside of sphere
(d) none of these

(a) Centre of sphere

(a) 2
(b) 3
(c) 4
(d) Any number

(d) Any number

#### 8. A body is in equilibrium when its:

(a) Acceleration is uniform
(b) Speed and acceleration are uniform
(c) Speed is uniform
(d) Acceleration is non-uniform

(c) Speed is uniform

#### 9. Formula for the direction of resultant force with the help of rectangular components.

(a) 𝛳 = tan-¹ fx/fy
(b) 𝛳 = tan-¹ fy/fx
(c) 𝛳 = sin-¹ fy/fx
(d) 𝛳 = cos-¹ fy/fx

(b) 𝛳 = tan-¹ fy/fx

(a) 10N
(b) 5N
(c) Zero
(d) Maximum

(c) Zero

(a) 1
(b) 2
(c) 3
(d) 4

(b) 2

(a) 1
(b) 2
(c) 3
(d) 4

(c) 3

(a) sin 𝛳
(b) cos 𝛳
(c) tan 𝛳
(d) cosec 𝛳

(d) cosec 𝛳

#### 14. Racing cars are made stable by:

(a) Increasing their speed
(b) Decreasing their speed
(c) Decreasing their width
(d) Lowering their centre of gravity

(d) Lowering their centre of gravity

#### 15. The direction of resultant vector can be found by:

(a) 𝛳 = tan fx/fy
(b) 𝛳 = tan fy/fx
(c) 𝛳 = tan-¹ fx/fy
(d) 𝛳 = tan-¹ fy/fx

(d) 𝛳 = tan-¹ fy/fx

(a) 1.62 ms-²
(b) 3.7 ms-²
(c) 9.8 ms-²
(d) 10 ms-²

(a) 1.62 ms-²

(a) 2 g
(b) 1/2 g
(c) 1/3 g
(d) 1/4 g

(d) 1/4 g

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