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Class 9Class 10First YearSecond Year
4.12 Why a body cannot be in equilibrium due to single force acting on it?
4.12 Why a body cannot be in equilibrium due to single force acting on it?

4.12 Why a body cannot be in equilibrium due to single force acting on it?

4.6 The steering of a car has a radius 16 \mathrm{~cm} . Find the torque produced by a couple of 50 \mathrm{~N} . (16 \mathrm{Nm})
4.6 The steering of a car has a radius  16 \mathrm{~cm} . Find the torque produced by a couple of  50 \mathrm{~N} . (16 \mathrm{Nm})

4.6 The steering of a car has a radius 16 \mathrm{~cm} . Find the torque produced by a couple of 50 \mathrm{~N} . (16 \mathrm{Nm})

EXAMPLE 4.6 A uniform rod of length 1.5 \mathrm{~m} is placed over a wedge at 0.5 \mathrm{~m} from its one end. A force of 100 \mathrm{~N} is applied at one of its ends near the wedge to keep it horizontal. Find the weight of the rod and the reaction of the wedge.
EXAMPLE  4.6 A uniform rod of length  1.5 \mathrm{~m}  is placed over a wedge at  0.5 \mathrm{~m}  from its one end. A force of  100 \mathrm{~N}  is applied at one of its ends near the wedge to keep it horizontal. Find the weight of the rod and the reaction of the wedge.

EXAMPLE 4.6 A uniform rod of length 1.5 \mathrm{~m} is placed over a wedge at 0.5 \mathrm{~m} from its one end. A force of 100 \mathrm{~N} is applied at one of its ends near the wedge to keep it horizontal. Find the weight of the rod and the reaction of the wedge.

4.3 Differentiate the following:(ii) torque and couple
 4.3 Differentiate the following:(ii) torque and couple

4.3 Differentiate the following:(ii) torque and couple

EXAMPLE 4.1Find the resultant of three forces 12 \mathrm{~N} along x-axis 8 \mathrm{~N} making an angle of 45^{\circ} with x-axis and 8 \mathrm{~N} along y -axis.
EXAMPLE 4.1Find the resultant of three forces  12 \mathrm{~N}  along x-axis  8 \mathrm{~N}  making an angle of  45^{\circ}  with x-axis and  8 \mathrm{~N}  along  y -axis.

EXAMPLE 4.1Find the resultant of three forces 12 \mathrm{~N} along x-axis 8 \mathrm{~N} making an angle of 45^{\circ} with x-axis and 8 \mathrm{~N} along y -axis.

4.8 Two blocks of masses 5 \mathrm{~kg} and 3 kg are suspended by the two strings as shown. Find the tension in each
 4.8  Two blocks of masses  5 \mathrm{~kg}  and 3 kg are suspended by the two strings as shown. Find the tension in each

4.8 Two blocks of masses 5 \mathrm{~kg} and 3 kg are suspended by the two strings as shown. Find the tension in each