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

15.3 cos 65 degrees trig

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.