cydniidaniels
contestada

A 2.2 × 103
kg car accelerates from rest under
the action of two forces. One is a forward
force of 1147 N provided by traction between
the wheels and the road. The other is a 934 N
resistive force due to various frictional forces.
How far must the car travel for its speed to
reach 2.2 m/s?

Respuesta :

2.2 x 10^3 = 2200 kg 

F = m x a 

1143 - 909 = 234 N 

234 / 2200 = a = 0.106 m/s^2 

v^2 = u^2 + 2as since u^2 = zero we have v^2 = 2as 

2.8^2 = 7.84 
7.84/(2a) = s = 36.98 m

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