Compared to an object that does not roll, but instead slides without friction, should a rolling object be released from the same, a greater, or a lesser height in order just barely to complete the loop the loop? view available hint(s) compared to an object that does not roll, but instead slides without friction, should a rolling object be released from the same, a greater, or a lesser height in order just barely to complete the loop the loop? the rolling object should be released from a greater height. the rolling object should be released from a lesser height. the rolling object should be released from exactly the same height.

Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency

Why does the input force have to be greater than the force needed to lift the bale?

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)