Question

a force of 45 N is exerted on an object, resulting in an acceleration of 5 m/s^2 for the object. What will the objects acceleration be if the force doubles?
A 2.5 m/s^2
B 5 m/s^2
c 10 m/s^2
d 20 m/s^2

Answer 1

please note that the mass of your object is:
\[m=\frac{ F }{ a }=\frac{ 45 }{ 5 }=9 \; Kg\]
so if the force doubles, we have F=90 N, please apply this formula now:
\[a=\frac{ F }{ m }\]