If the net external force on a body is zero, its acceleration:
  • A
    must be equal to zero
  • B
    may be equal to zero
  • C
    must be non-zero
  • D
    must be equal to $$g$$


Newton's 2nd law states that force on a body is equal to mass times acceleration. For a zero external force, there will be a zero acceleration for body. Hence, acceleration will be zero for no net external force.