Online MCQs Quiz on Turning Effects of Force

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SSC-I (Class 9) Physics; Unit-4; Turning Effects of Force

i. Two equal but unlike parallel forces having different line of action produce

10 points

(a) torque

(b) couple

(d) neutral equilibrium

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ii. The number of forces that can be added by head to tail rule are:

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(a) 2

(b) 3

(d) any number

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iii. The number of perpendicular components of a force are:

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(a) 1

(b) 2

(d) 4

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iv. A force of 10 N is making an angle of 30⁰ with the horizontal. Its horizontal component will be:

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(a) 4 N

(b) 5 N

(d) 8.7 N

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v. A couple is formed by:

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(a) two forces perpendicular to each other

(b) two equal and opposite forces in the same line

(d) two equal and opposite forces not in the same line

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vi. A body is in equilibrium when its:

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(a) acceleration is uniform

(b) speed is uniform

(d) acceleration is zero

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vii. A body is in neutral equilibrium when its centre of gravity:

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(a) is at its highest position

(b) is at its lowest position

(d) is situated at its bottom

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viii. Racing cars are made stable by:

10 points

(a) increasing their speed

(b) decreasing their mass

(d) decreasing their width

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