Class 10 ICSE Physics – Chapter 1 | MCQ Test (Set -3)

11 mark(s)

A force of 15 N acts at a perpendicular distance of 0.4 m from a pivot. If the force is shifted to a distance of 0.8 m, the moment becomes:

A3B6C12D24

21 mark(s)

A 4 N force and a 6 N force act in opposite directions along parallel lines 0.5 m apart. The resultant effect is:

AA force of 2 N onlyBA couple onlyCZero force and zero momentDA force of 2 N with a turning effect

31 mark(s)

A uniform metre rule weighs 1 N and is pivoted at its 50 cm mark. A 2 N weight is placed at 20 cm. Where should a 1 N weight be placed to balance it?

A60 cmB80 cmC70 cmD100 cm

41 mark(s)

The moment of a force is zero when:

AForce is perpendicular to the leverBLine of action passes through the pivotCDistance from pivot is maximumDForce is maximum

51 mark(s)

A couple consists of two forces of 25 N each separated by 0.2 m. Its moment is:

A5 NmB10 NmC50 NmD12.5 Nm

61 mark(s)

A body is in rotational equilibrium when:

AOnly one force acts on itBClockwise moment is equal to anticlockwise momentCNet force is maximumDIts velocity is zero

71 mark(s)

If the force acting on a lever is doubled and its perpendicular

ADoubleBBecome four timesCRemain unchangedDBecome half

81 mark(s)

Which situation represents a stable equilibrium?

AA body returns to its original position after a slight displacementBA body moves farther away after displacementCA body remains in its new positionDA body has no centre of gravity

91 mark(s)

A force produces a moment of 20 Nm when its perpendicular distance from the pivot is 0.5 m. The force is:

A10 NB40 NC20 ND50 N

101 mark(s)

A longer spanner is preferred for loosening a tight nut because it:

AReduces friction to zeroBIncreases the mass of the nutCDecreases the moment of forceDDecreases the force required