1. The problem statement, all variables and given/known data A farmer is throwing bales of hay off the back of his tractor with a speed of 3 m/s relative to the tractor, which is moving west with a speed of 7 m/s. Determine the speed and direction of hay bales relative to the ground. 2. Relevant equations subtract the speeds, since they are in opposite directions 3. The attempt at a solution 4 m/s -- this is where the issue arises: the direction of the hay bales. my son's teacher says one thing, and i insist it's the opposite. without revealing which of us believes what here, can you please tell me what the answer SHOULD be? Thank you!