Recent content by dimeloom

Thank you so mu rl.bhat. After the 2nd derivative I get a= (.12m/s^3)(t) - .12m/s^2 = (.6m/s^2)- .12m/s^2= -.6 m/s^2 F=m*a m=F/a m=3000n/9.81m/s^2=305.8kg m*a=F 305.8 kg * -.6m/s^2=-183.48N Is that thought process correct?

[b]1.The position vector of a 3000N helicopter is given by: r=(.02 m/(s^3))(t^3)i + (2.2m/s)tj - (0.06 m/(s^2))(t^2)k Find the net force on the helicopter at t = 5s. [b]2. I really have no clue where to begin. [b]3. I started doing this: r=...