Homework Statement
A 0.525kg ball starts from rest and rolls down a hill with uniform acceleration, traveling 200m during the second 10.0 s of its motion.Homework Equations
xf= xi + vi +1/2a(t)^2
x= vi + atThe Attempt at a Solution
a= 4 m/s^2
x=50 mits wrong
Homework Statement
A rock of blasts of vertically from rest on the launch pad with an upward acceleration 2.60 m/s^2= At 30s after blast off, the engine suddenly fails, which means the force they instantly stops.Homework Equations
The Attempt at a Solution
How high above the launch pad will...
i did
620-120= 500
so that makes 4000/500= 8 hoursfor 1 other
it only affects 1 trip
so 2000/620= 3.225
2000/500= 4
so trip time = 7.225
both answers wrong
Homework Statement
A jetliner has a cruising air speed of 620mph relative to the air.
Part B
How long does it take this plane to fly round-trip from San Francisco to Chicago, an east–west flight of 2000 miles each way, if the wind is blowing at 120mph from the west to the east?
Homework...