Write different type of common forces.
Write different type of common forces.
Gravitational force, electric force and electromagnetic force are field force. Push or pull are other force in mechanics are contact forces.
A book resting on a table, system of rigid bodies connected by hings (or support) are mutual constant forces.
Component of constant force normal to surface is called reaction $(\mathrm{R}=\mathrm{N})$ Component of contact force parallel to surface is called frictional force.
Some examples of contact forces in mechanics
When spring is subjected to external force restoring force is developed in the spring which tries to regain original shape. This restoring force is proportional to change in length which is given by equation $\mathrm{F}=-\mathrm{K} x$. Negative sign indicate that restoring force is in opposite direction to displacement.
Similar Questions
Three blocks of masses $2 \,kg, 3 \,kg$ and $5\, kg$ are connected to each other with light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force $F = 10N,$ then tension ${T_1} = $ .......... $N$
Three blocks of masses $2 \,kg, 3 \,kg$ and $5\, kg$ are connected to each other with light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force $F = 10N,$ then tension ${T_1} = $ .......... $N$
In the given arrangement, the normal force applied by block on the ground is
In the given arrangement, the normal force applied by block on the ground is
There are three forces $\vec {F_1}$, $\vec {F_2}$ and $\vec {F_3}$ acting on a body, all acting on a point $P$ on the body. The body is found to move with uniform speed.
$(a)$ Show that the forces are coplanar.
$(b)$ Show that the torque acting on the body about any point due to these three forces is zero.
There are three forces $\vec {F_1}$, $\vec {F_2}$ and $\vec {F_3}$ acting on a body, all acting on a point $P$ on the body. The body is found to move with uniform speed.
$(a)$ Show that the forces are coplanar.
$(b)$ Show that the torque acting on the body about any point due to these three forces is zero.
Figure shows two cases. In first case a spring (spring constant $K$ ) is pulled by two equal and opposite forces $F$ at both ends and in second case is pulled by a force $F$ at one end. Extensions $(x)$ in the springs will be
Figure shows two cases. In first case a spring (spring constant $K$ ) is pulled by two equal and opposite forces $F$ at both ends and in second case is pulled by a force $F$ at one end. Extensions $(x)$ in the springs will be
A body of weight $2\, kg$ is suspended as shown in the figure. The tension ${T_1}$ in the horizontal string (in kg wt) is
A body of weight $2\, kg$ is suspended as shown in the figure. The tension ${T_1}$ in the horizontal string (in kg wt) is