2. a 4.5 kg model rocket is launched, expelling 152 grams of burned fuel from its exhaust at a speed of
786 m/s. what is the speed of the rocket after the fuel has burned? ignore the forces of gravity and air
resistance.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

When using the scientist method, which step comes last?