An 86 kg ice skater is skiing in a circle at 4.5 m/s. The radius of the circle is 6 m. What is the centripetal force needed to stay in the circle?

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Abird sitting high in a tree is an example of what type of wnergy

Which feature of a heating curve indicates a change ofn state