a student pushes a 40-n block across the floor for a distance of 10 m. how much work was done to move the block? 4 j 40 j 400 j 4,000 j

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

An observer that stands still as the electron moves by him, will observe

How do you tell if someone actually cares about you? and just say they do?