Q1. A 60 kg circus performer jumps from a 6.2 m height onto a trampoline and stretches it downward 0.36 m. Assume that the trampoline obeys Hooke's law.
a) How far would it stretch if the performer jumps from a height of 7.6 m?
b) How far would the trampoline stretch if performer stands still on it while taking a bow?
Q2. An electric motor rotating a workshop grinding wheel at a rate of 9.00x10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.80 rad/s2. (a) How long does it take for the grinding wheel to stop? (b) Through how many radians has the wheel turned during the interval found in (a)?