Grapc crossword puzzle

123456
Across
  1. 2. the vector sum of forces acting on a particle or object
  2. 4. forces that are equal in size and opposite in direction
  3. 5. is the rate at which someone or something is able to move or operate.
  4. 6. the speed of something in a given direction.
Down
  1. 1. the force applied in one direction is greater than the force applied in the opposite direction
  2. 3. a vehicle's capacity to gain speed within a short time.