Acoil of 1000 turns encloses an area of 25cm2. it is rotated in 0.010 s from a position where its plane is perpendicular to earth’s magnetic field to one where its plane is parallel to the field. if the strength of the field is 6.0×10−5t, what is the average emf induced in the coil?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.