Question

In the body with mass m = 2kg having velocity v = 20m / s under the action of force F stopped after 10s. Then the force F is: 

 A) 4N 

 B) 5N 

 C) 8N 

 D) 10N

Answer 1

$$Ft=mv\\10F=2(20)\\F=4\ N$$

Answer: A) 4N