Friction reduces efficiency because energy is lost as
a. work
c. gravity
b. heat
d. thrust

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.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

Where should a carbon monoxide detector be mounted?