A42.0-kg parachutist is moving straight downward with a speed of 3.85 m/s. (a) if the parachutist comes to rest with constant acceleration over a distance of 0.750 m, what force does the ground exert on her? (b) if the parachutist comes to rest over a shorter distance, is the force exerted by the ground greater than, less than, or the same as in part (a)? explain.

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?