Answer:
8200 N
Explanation:
F=ma where F is force, m is mass and a is acceleration
[tex]s=ut+0.5at^{2}[/tex] where s is distance, t is time and u is initial velocity
[tex]a=\frac {2(s−ut)}{t^{2}}=\frac {2(45−0(3))}{3^{2}}=\frac {90}{9}=10 m/s^{2}[/tex]
[tex]F=820\times 10=8200 N[/tex]
