An object is resting motionless on a surface. According to Newton’s first law, the object will only start to move if
1 the net forces on the object equal zero.
2 an unbalanced force is applied to the object.
3 the upward force of the object is equal to its acceleration.
5 two forces that are equal and opposite are applied to the object.

2

Answers

2014-06-10T11:46:25+08:00
an unbalanced force is applied to the object.
0
2014-06-10T18:55:58+08:00
2 because if there's an unbalance force acted on it there will be a motion
1 5 1