A 65.0kg teacher (including the parachute) is skydiving! As the parachute opens, the system experiences a 1500N drag. What is the magnitude of the net force on the system?
What is the magnitude of the system's acceleration?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.