5. A car has a mass of 820 kg. It starts from rest and travels 41 m in 3.0 seconds. What is the net force applied to the car? 6. What is the net force needed to lift a full grocery sack (weighing 210 N) uniformly? 7. What is the net force needed to accelerate the 210 N grocery sack upward at 1.5 m/s?? 8. A family is stretching out a big blanket (mass= 1.3 kg) to lay down on the ground for a picnic. If Mom pulls with 22 Newtons to the West, Dad pulls with 17 Newtons to the East, Eva pulls with 18 Newtons to the South, and Carlton suddenly yanks it with 32 Newtons to the North, what would be the acceleration (including direction) of the blanket