1. The problem statement, all variables and given/known data A 24.0kg dog running at a speed of 3.0m/s jumps onto a stationary skateboard that has a mass of 3.6 kg how long will it take a force with a magnitude of 9.0 N to stop the skateboard and the dog? 2. Relevant equations F(change in time)=Pf-Pi P=MV 3. The attempt at a solution I dont understand how to calculate the length of time that it takes for the 9.0N force is going to slow down the skateboard and the dog.