Answer:
F = 7500 N
Explanation:
given,
mass of the car, m = 1200 Kg
initial speed of the car, v = 25 m/s
final speed of car = 0 m/s
time in which car is at rest, t = 5 s
distance = 50 m
Force = ?
using equation of motion for the calculation of acceleration.
v² = u² + 2 a s
0² = 25² + 2 x a x 50
100 a = -625
a = - 6.25 m/s²
negative sign shows deceleration of the car
now, force calculation
F = m a
F = 1200 x 6.25
F = 7500 N
hence, net force is equal to F = 7500 N
The
correct answer to this would be letter:
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