1.- Una particula se desplasa (-45i + 61 j) km con velocidad Constante Durante 6 min. DETERMINE
a) La velocidad en m/s
b) La rapidez m/s
c) El vector unitario de la velocidad
d) El vector unitario del desplazamiento
AYUDAAA!!!

Ball b is hanging from an inextensible cord. an identical ball a is released from rest when it is just touching the cord and drops through the vertical distance h a 5 8 in. before striking ball b. assuming e 5 0.9 and no friction, determine the resulting maximum vertical displacement h b of the ball b

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.