1. The problem statement, all variables and given/known data At time , t s , a particle with a mass 1 kg moves under the action of force F=6(i+t j) N. If the particles starts to move at time t=0 ,find the velocity of the particle at t=5 . 2. Relevant equations 3. The attempt at a solution By F=ma the acceleration vector , a = 6i+6t j integrate this gives , v= (6t+c)i+(3t^2+c)j and when t=0 , v=0 therefore , v=(6t)i+(3t^2)j and at t=5 s, v=(30)i+(75)j and my next job is to find its magnitude Is everything allright ?