Answer:
30N is the correct answer
<span>B.) The motion of the planet as it spins on its axis
Please be careful with option A, 'cause it is "Revolutionary motion", many people would choose that but, it's wrong.
In short, Your Answer would be Option B
Hope this helps!</span>
Answer: Job and career
Explanation:
Work is associated with job and career. If somebody is having a great career and if somebody wants a great career he will look for a job that is fitting his career and in that way, he will work for it to have an even better career which will bring him a better job.
Answer:
The velocity of the 4.00 kg object after the collision is 12 m/s.
Explanation:
Given that,
Mass of object 
Velocity of object 
Mass of another object 
Velocity of another object 
We need to calculate the relative velocity


The relative velocity is 8 m/s in west before collision.
We know that,
In one dimensional elastic collision, the relative velocity before collision equals after collision but with opposite sign.
So, The relative velocity after collision must be 8 m/s in east.
So, The object of 6.00 kg is going 20 m/s and the object of 4.00 kg is slows down to 12 m/s.
Hence, The velocity of the 4.00 kg object after the collision is 12 m/s.
like just try and try you gut it just trust me I'm a Wuman and you a man