How much force does it take to accelerate a 2,000-kg car at 4 m/s
a.19,600 n
b..002 n
c.8,000 n
d.500 n

C. 8,000 N

Explanation:

Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it.  

This law can be expresses as F=ma,

where  

The more mass an object has, the more force you need to accelerate it. And the greater the force, the greater the object's acceleration.

F = ma

  =2000×4 = 8,000 N

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue