Part of a single rectangular loop of wire with dimensions b=0.750m along the x dir., l=0.350m along the y direction is situated in the xy plane inside a region of uniform magnetic field of 0.650 t pointing in neg z direction (into the board) . the total resistance of the loop is calculate the force required to pull the loop from the field (to the right in pos x dir) at a constant velocity of the neglect gravity.

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)