Two carts connected by a 0.05 m spring hit a wall, compressing the spring to 0.02 m. The spring constant k is N
100
m
What is the elastic potential energy stored from the spring's compression?
Choose 1
-3.0J
-0.045 J
0.090 J
0.045 J

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.