A wind blowing at 25.0° exerts a force of 675 N on the sail of a boat which in turn is propelled 1.55 km, 45.0°. (Consider directions as viewed from overhead.) Find the work done by the wind.

What properties of a moving object are used in determining the object's energy of motion

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.