Class 10 ICSE Physics – Chapter 1 | MCQ Test (Set -2)

11 mark(s)

A force of 10 N acts on a body at an angle of 30° to a lever arm of length 0.5 m. The moment of force about the pivot is:

A5 NmB4.33 NmC2.5 NmD10 Nm

21 mark(s)

A uniform metre rule is balanced at the 50 cm mark. A 2 N weight is suspended at 20 cm. At which point should a 3 N weight be suspended on the other side for equilibrium?

A60 cmB65 cmC70 cmD75 cm

31 mark(s)

A couple produces a moment of 12 Nm when the perpendicular distance between its forces is 0.4 m. The magnitude of each force is:

A3 NB4.8 NC48 ND30 N

41 mark(s)

Which statement about the centre of gravity of a body is correct?

AIt may lie outside the material of the body.BIt always coincides with the centre of mass.CIt must always lie inside the body.DIt is always at the geometrical centre.

51 mark(s)

A body is in equilibrium under the action of two forces. The two forces must be:

AEqual and perpendicularBEqual, opposite and collinearCEqual, opposite and parallelDUnequal and opposite

61 mark(s)

If the perpendicular distance of the line of action of a force from the pivot is doubled, while the force remains unchanged, the moment becomes:

AHalfBFour timesCDoubleDUnchanged

71 mark(s)

A clockwise moment of 8 Nm is produced by a force of 20 N. What force at a perpendicular distance of 0.5 m will balance it?

A8 NB12 NC20 ND16 N

81 mark(s)

A couple differs from a single force because a couple:

AProduces only rotationBAlways produces accelerationCProduces only translationDProduces neither rotation nor translation

91 mark(s)

A machine has a mechanical advantage of 4 and an efficiency of 75%. Its velocity ratio is:

A3B6C5D5.33

101 mark(s)

A force acts along the length of a lever arm passing through the pivot. The moment produced is:

AInfiniteBZeroCMinimum but non-zeroDMaximum