Why should the safety net that is used in circuses under trapezoids be little tightened?

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

How is the ideal mechanical advantage of a wheel and axle calculated?