Ineed with this physics problem. i've been stuck forever: two packages at ups start sliding down the 18° ramp. package a has a mass of 5.08 kg and a coefficient of friction of 0.18. package b has a mass of 10.74 kg and a coefficient of friction of 0.13. how long does it take package a to reach the bottom? (s=2.08 m) !

Ball A with a mass of 0.500 kg is moving east at a velocity of 0.800 m/s. It strikes ball B, also of mass 0.500 kg, which is stationary. Ball A glances off B at an angle of 40.0° north of its...Two smart cars depart from the same starting location at the same time and travel different routes to the same destination, arriving at the same time. Explain why the cars travelled different...Given electric flux density D=0.3r^2 ar nc/m^2 in free space a. Find the total charge within the sphere r=3 b. Find the total electric flux leaving the sphere r=4