Troy pushes on a car for 10 seconds, during which he applies an impulse of 300 kg•m/s. what force does he apply to the car?

Impulse, I = FΔt

Where F = Force applied, Δt = change in time for which the force is applied.

Now,

1 kg. m/s = 1 Ns

Therefore,

I = 300 kg. m/s = 300 Ns

F = I/Δt = 300 Ns/10 s = 30 N

The force applied is 30 N