#82
here we know that
acceleration = 2 m/s/s
time = 5 s
initial speed = 4 m/s
now we can use kinematics to find the final speed
[tex]v_f = v_i + at[/tex]
[tex]v_f = 4 + 2(5)[/tex]
[tex]v_f = 14 m/s[/tex]
So correct answer will be option D)
#83
here we know that
acceleration = 3 m/s/s
time = 4 s
initial speed = 5 m/s
now we can use kinematics to find the final speed
[tex]v_f = v_i + at[/tex]
[tex]v_f = 5 + 3(4)[/tex]
[tex]v_f = 17 m/s[/tex]
So correct answer will be option C)
#84
here we know that
acceleration = 7 m/s/s
time = 3 s
initial speed = 8 m/s
now we can use kinematics to find the final speed
[tex]v_f = v_i + at[/tex]
[tex]v_f = 8 + 7(3)[/tex]
[tex]v_f = 29 m/s[/tex]
So correct answer will be option C)
