How great is the air resistance that acts on a 10-N sack that falls in air at constant velocity?

Answer:
constant velocity= no acceleration and no net force

Assuming that there are no other forces acting on the sack (besides gravity and air resistance) this means that the force of air friction equals the weight of the object, so that the air resistance is 10N acting upward exactly balancing the force of gravity acting down
First answer by ID1281869537. Last edit by Brian Gaulke. Contributor trust: 8 [recommend contributor recommended]. Question popularity: 0 [recommend question].