An electric motor with a 2.0-hp output drives a machine with an efficiency of 40%. What is the energy output of the machine per second?
Answer to relevant QuestionsWater is lifted out of a well 30.0 m deep by a motor rated at 1.00 hp. Assuming 90% efficiency, how many kilograms of water can be lifted in 1 min? A construction hoist exerts an upward force of 500 N on an object with a mass of 50 kg. If the hoist started from rest, determine the power it expended to lift the object vertically for 10 s under these conditions. A block on a level frictionless surface has two horizontal forces applied, as shown in Fig. 5.28. (a) What force F2 would cause the block to move in a straight line to the right? (b) If the block moves 50 cm, how much work ...Two objects have the same momentum. Do they necessarily have the same kinetic energy? Explain. A 0.20-kg billiard ball traveling at a speed of strikes the side rail of a pool table at an angle of (Fig. 6.31). If the ball rebounds at the same speed and angle, what is the change in its momentum?
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