A 71.9-kg vertically falling skydiver experiences an upward force of air resistance of 1720.0 N. Determine the acceleration (in m/s/s) of the skydiver. (Enter a - value if the direction is downward.)

Skydiving tunnels have become popular attractions, appealing in part to those who would like a taste of the skydiving experience but are too overwhelmed by the fear of jumping out of a plane at several thousand feet. Skydiving tunnels are vertical wind tunnels through which air is blown at high speeds, allowing visitors to experience bodyflight. On Natalya's first adventure inside the tunnel, she changes her orientation and for an instant, her 56.9-kg body momentarily experiences an upward force of air resistance of 721.0 N. Determine Natalya's acceleration during this moment in time.

While skydiving, Dee Selerate opens her parachute and her 50.2-kg body immediately accelerates upward for an instant at 6.16 m/s/s. Determine the upward force experienced by Dee during this instant.

Amaya is a destined engineer. Ever since she was a young child, she would join her Dad (also an engineer) on weekends to launch toy rockets. This in part explains why she is such a Physics wizard. Last weekend, they launched a 0.431-kg rocket and estimated its upward thrust at one instant to be 6.28 N. What was the rocket's acceleration?

Ezra is occasionally asked to work the check-out line during his shifts at the Hy-Vee grocery store. During a recent lesson on Newton's Laws, he re-lived a memory from work. He wrote the following Physics problem and he wants you to solve it:

The handle of a paper grocery sack has a breaking strength of 211.0 N. Ezra loads the bag with 12.4-kg of soup cans. With what maximum acceleration can he lift the sack without breaking the handles?