If a ball is rolling with 5 pounds of force, how much force will be needed to stop the ball from rolling and why? A
It would take 25 pounds of force to stop the ball from rolling because it takes five times as much force to stop as object.

B
It would take 2.5 pounds of force to stop the ball from rolling because it takes half of the amount of force to stop an object.

C
It would take 10 pounds of force to stop the ball from rolling because it takes double the amount of force to stop an object.

D
It would take 5 pounds of force to stop the ball from rolling because the same amount of force must be used to stop the object.

An uplifted block of rock between two normal faults

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.

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem