Two packages at UPS start sliding down the 20 degree ramp shown in the figure. Package A has a mass of 4.00 kg and a coefficient of kinetic friction of 0.180. Package B has a mass of 11.5 kg and a coefficient of kinetic friction of 0.170. How long does it take package A to reach the bottom?

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Aforce of 9.00 newtons acts at an angle of 19.0 to the horizontal. what is its component in the horizontal direction?

This is the substance(s) formed in a chemical reaction.