5. Sally who works at Little Caesars slides a 0.55 kg glass of soda from one end of the counter down to a thirsty customer. A force of friction of 1.3 N brings the
drink to a stop right in front of the customer. a) What is the coefficient of sliding
friction between the glass and the counter? b) If the glass encounters a sticky
patch on the counter, will this spot have a higher coefficient of friction? *
Your answer

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)

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?