ive tried to find the answer but everywhere i look i get none of these answers

Question

A 20 kg box is accelerating at 10 m/s? What is the force exerted on the box? 

a) 100 N 

b) 2N c) 50 N 

d) 200 N 

Answer 1

your acceleration units are incorrect, should be 10 m/s^2, with that said the equation is Force (N) = mass (kg)*acceleration (m/s^2). Now you are able to find the rest, use a calculator or simple multiplication