Un autocar que circula a 81 km/h frena uniformemente con una aceleración de -4,5 m/s2. a) Determina cuántos metros recorre hasta detenerse.

b) Representa las gráficas v-t y s-t.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?