Given data
*The given force exerted on the car is F = 2100 N
*The given initial speed of the car is u = 0 m/s
*The given final speed of the car is v = 9 m/s
*The given time is t = 3 s
The formula for the acceleration of the car is given by the first equation of motion as
[tex]v=u+at[/tex]Substitute the known values in the above expression as
[tex]\begin{gathered} 9=0+a(3) \\ a=3m/s^2 \end{gathered}[/tex]The formula for the mass of the car is given as
[tex]\begin{gathered} F=ma \\ m=\frac{F}{a} \end{gathered}[/tex]Substitute the known values in the above expression as
[tex]\begin{gathered} m=\frac{2100}{3} \\ =700\text{ kg} \end{gathered}[/tex]Hence, the mass of the car is m = 700 kg
