Which three things are related according to Newton's second law? force, mass, and acceleration force, matter, and acceleration force, motion, and acceleration force, weight, and acceleration

Is the alien theory a scientific claim? why or why not? just took the test it was , : " the alien theory is not a scientific claim because it is not based on valid data, there is no evidence to support it, and it does not come from a reliable source."

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Of is j/kg·k. if a 2.6 kg of isk to k,is ?