Question

If it takes an average force of 5.4 N to push a 4.8-g dart 5.4 cm into a dart gun, assuming the barrel is frictionless, how fast will the dart exit the gun?

Answer 1

F•s= m•v²/2
v = sqrt(2•F•s/m) =
=sqrt(2•5.4•5.4•10^-2/4.8•10^-3)= 11 m/s