How many collisons occur when a vehichle hits a solid object
a 2
b 3
c.0
d 1

Answer is B. 3. 

1. Vehicle
2. Solid Object
3. Person in control

I believe it is
D.
only because one car collides into an object and the object did not collide into the car
here let me better explain
the car is driving and collides into the pole or building or etc. thats only one collision but 2 things collide so the answer is D. 1

    5.5 n======    assuming that      we have      m = 0.145 kg    a = 38 m/s²therefore    5.51 n, but two significant figures.final answer: 5.5 n