Respuesta :
Answer:
The work done by the frictional force, W = 612565.32 J
Explanation:
Given data,
The mass of the car, m = 1811 kg
The initial velocity of the car, u = 0 m/s
The final velocity of the car, v = 23 m/s
Let the time period of the car be, t = 3 s
The acceleration of the car,
a = (v-u) /t
= (23 - 0)/ 3
= 7.67 m/s²
The normal force acting on the car,
F = mg
= 1811 kg x 9.8 m/s²
= 17747.8 N
The displacement of the car,
s = ut + ½ at²
= 0 + ½ x 7.67 x 3²
= 54.52 m
The work done by the frictional force,
W = F · S
W = 17747.8 N x 54.52 m
= 612565.32 J
Hence, the work done by the frictional force, W = 612565.32 J
