a 275-kilogram object starts from rest and accelerates on level ground up to a speed of

41 meters per second over 49.3 meters. it continues at that speed for another 15

meters. at the end of the 15 meters, the object is launched forward at a 37° angle.

a. how much time does it take for the object to reach its final velocity?

b. how much force did the object apply in order to reach that final speed?

c. what are the maximum range and height of the object when it is launched?

d. at what angle would the object have to be launched to reach a height of 50

meters above the ground at the same initial velocity?

e. describe a realistic scenario in which this might happen.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

What is a good example of instantaneous speed