Achair of mass 15.0 kg is sitting on the horizontal floor; the floor is not frictionless. you push on the chair with a force of 60.0 n that is directed at an angle of 40.0° below the horizontal, and the chair slides along the floor. use a free-body diagram and newton’s laws to calculate the normal force that the floor exerts on the chair.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

An object in mechanical equilibrium is an object

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these