When a mass of 2.5 x 10^2 kg is attached to a certain spring and set in motion it makes 20 complete cycles in 4.0 s. What is the spring constant of the spring?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher