3. (20 pts. ) A 1.450 kg block experiences a force of F(t) - (8:000 N/s)t - 2.000 N down a 45.000 incline with /, = 0.400 and uk = 0.250 for 2.000 seconds. (a) The system is moving at 0.500 m/s at t = 0. However, would the forces that act on the block at t = 0 make the system start to move all by themselves? Use force analysis, including a clearly drawn FBD for the block at that time treating the block as at rest to answer this question. (Remember that for the rest of the problem, you are to assume that the system is already in motion at t = 0 regardless of your answer to this question!) (b) How far does the block travel in the first two seconds that the applied force acts on the block? (c) What is the net work done on the block in those first two seconds? (d) What is the instantaneous power of the applied force acting on the block at t = 1.500 s