Question

1. The US government built a secret high speed underground train form Area 51 in Nevada to its Deep Underground Military Base (DUMB) in Dulce NM. A train starts from rest and accelerates uniformly, until it has traveled 2 km and acquired a velocity of 600 m/s. The train then moves at a constant velocity of 600 m/s for .3615 hrs. The train then slows down uniformly at 90 m/s2, until it is brought to a halt. A) What is the distance traveled by the train? B) How long does it take the men in black to get from Area 51 to Dulce NM? Drawing

2.

A small rock is thrown vertically upward with a speed of 22m/s from the edge of a roof 30m tall building. The rock doesn’t hit the building on its way back down and lands on the street below. Ignore air resistance. (a) What is the speed of the rock just before it hits the street? (b) How much time elapses from when the rock is thrown until it hits the street? DIAGRAM!!

Answer 1