Answer:
F = 47.04 N
Explanation:
Given,
The mass of the kid, m = 32 Kg
The initial velocity of the kid, u = 8.5 m/s
The final velocity of the kind, v = 4.1 m/s
The time period of travel. t = 3 s
Using the first equations of motion,
v = u + at
a = (v - u) /t
= (4.1 - 8.5) / 3
= -1.47 m/s²
The negative sign indicates that the acceleration of the frictional force is against the motion of the child.
The acceleration of the frictional force, a = 1.47 m/s²
Therefore, the frictional force,
F = m x a
= 32 x 1.47
= 47.04 N
Hence, the frictional force acting on the child is, F = 47.04 N
