A 0,68-kg rock is attached to a 0,33-m rope and spun in a vertical circle. The tension on the rope when the rock is at the top of the swing is 85 N [down]. What is the speed of the rock? (Use g=9.81 m/s2) Отдам всеееее

Ответ:

Use g=9.81 and g=9.81 m/s2

0,68-kg + 0,33-m rope

85*2=170s