Can you help me please it science

An object's buoyant force and weight mean the same thing.a. trueb. false

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.

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?