Un niño de 25 kg corre por un jardín con una velocidad de 2.5 m/s de forma que su trayectoria es tangente al borde de un carrusel de 500 kg•m2 de momento de inercia y un radio de 2 m, que está parado. el niño salta sobre el carrusel y lo pone en movimiento. determina la velocidad angular del niño y del carrusel cuando se mueven juntos.

grupo de opciones de respuesta:

0.25 rad/s

5 rad/s

0.208 m/s

0.208 rad/s

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?