BITSAT Physics Laws Of Motion Online Test Set B

Inside a horizontally moving box, an experimenter finds that when an object is placed on a smooth horizontal table and is released, it moves with an acceleration of 10 m/s². In this box if 1 kg body is suspended with a light string, the tension in the string in equilibrium position (w.r.t. experimenter) will be (Take g = 10 m/s²)