A24 kg child on a 3.2 kg sled is sliding at 6.0 m/s. as the sled passes underneath a tree, a 5.2 kg mass of snow falls vertically and lands on the moving sled. calculate the final velocity of the sled. can some one show me how to do this? not just the answer but

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Hydrogen and helium are both members of?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.