A+flat+coil+is+in+a+uniform+magneti c+field. +what+angle+between+the+magnetic+fi eld+and+the+plane+of+the+coil+produ ces+the+maximum+flux,+and+what+angl e+produces+90%+of+the+maximum+flux? .

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.