A body is pulled along a horizontal plane by force of 15N over a distance of 20.0cm. if the force make an angle of 30° with the herizontal. calculate the energy used?​

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?