An electric bus (W=30,000 lb) on a horizontal road starts to move from rest. It’s motor...
3. An electric motor draws 2238 W and 12 A when operating on a 240 V source. Determine the (a) Power factor of the motor. (b) Apparent power input to motor. (c) True power input to motor. (d) Horsepower output of the motor if it is 75% efficient. 4 The follwing s found on the nameplate of a motor. 3 hp 60 Hz 1 phase 120/240 V 34/17 A 1,740 RPM irthe power factor of the motor is 0.30, what...
A test car starts from rest on a horizontal circular track of 80 m radius and increase its speed at a uniform rate to reach 100 Km/h in 10 seconds. Determine the magnitude of total acceleration of the car 8 seconds after the start . Rotation of the radially slotted arm is governed by 0-0.21 + 0.02r, where 0 is in radians and t is in seconds. Simultaneously, the power screw in the arm engages the slider B and controls...
15a. [1 mark ]A girl rides a bicycle that is powered by an electric motor. A battery transfers energy to the electric motor. The emf of the battery is 16 V and it can deliver a charge of 43 kC when discharging completely from a full charge.The maximum speed of the girl on a horizontal road is 7.0 m s' with energy from the battery alone. The maximum distance that the girl can travel under these conditions is 20 km.Show...
Linear Momentum of an object is conserved At all times b. Only when the net external force on the object is Zero When the net external torque on the object is Zero d. Never A truck of mass 4000 (kg) is moving at 10 (m/s). A car of mass 1000 (kg) is moving at 40 (m/s). So, the truck’s momentum, compared to the car, is Greater b. Smaller c. the same d. Cannot say without knowing their accelerations A 1000...
Zipcar: “It’s Not About Cars—It’s About Urban Life” Imagine a world in which no one owns a car. Cars would still exist, but rather than owning cars, people would just share them. Sounds crazy, right? But Scott Griffith, CEO of Zipcar, the world’s largest car-share company, paints a picture of just such an imaginary world. And he has nearly 800,000 passionate customers—or Zipsters, as they are called—who will back him up. Zipcar specializes in renting out cars by the hour...