Astudent drops a rock from a bridge to the water 12.7 m below. with what speed does the rock strike the water? the acceleration of gravity is 9.8 m/s 2

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

What’s #16 asking and how do i solve it?