The armature circuit resistance of a 250 V shunt motor is 0,3 ohm and its full load speed 1 000
/min. Calculate the resistance required in series
with the armature to reduce the full load speed
o 800 r/min at a full load armature current of
0 A. If the load torque is then 50% of its full
pad value, what will the speed of the motor be?
gnore the effect of armature reaction.​

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.)