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Sliding Friction force:
the force acting on bear due to friction is 3920 sinθ Newtons
The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction. Different types of friction exist.
Friction between two surfaces causes kinetic energy from moving surfaces to be converted into thermal energy (that is, it converts work to heat). As demonstrated by the utilization of friction produced by rubbing pieces of wood together to start a fire, this feature can have dramatic effects. Every time there is motion with friction, kinetic energy is transformed into thermal energy.
Calculation:
A 400 kilogram bear descends steadily
The net force needs to be zero for the velocity to remain constant.
given that zero acceleration equals constant velocity
F net = m a = m ( 0 ) = 0
The frictional force must be equal in strength to the gravitational force in order to balance it.
F net = F ×g − f k = 0
f k = F ×g
There must be an incline
The following horizontal force is exerted downward and parallel to the incline's surface:
f k = m g sin θ
Where theta the angle of inclination with respect to the x-axis
f k = 400 ( 9.8 ) sin f k = 3920 sinθ N
the force acting on bear due to friction is 3920 sinθ Newtons
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