A student is designing an SSD for a “Reserve Gym Equipment”…

A student is designing an SSD for a “Reserve Gym Equipment” use case. A member logs in, searches for available equipment, selects an item, and reserves it. The system internally checks the member’s account status before confirming the reservation. Which of the following best describes what the SSD should look like?

A skier (total mass 60.0 kg) starts from rest at the top of…

A skier (total mass 60.0 kg) starts from rest at the top of a hill that is 30.0 meters high. The skier goes down the hill, and at the bottom, their speed is measured to be 20.0 m/s. How much work was done on the skier by non-conservative forces (like friction and air resistance) as they skied down the hill?