A Sand Mover at a Quarry Lifts 2,000 Kg of Sand

question 9

Multiple Choice

A sand mover at a quarry lifts 2,000 kg of sand per minute a vertical distance of 12 m.The sand is initially at rest and is discharged at the top of the sand mover with speed 5.0 m/s into a loading chute.What minimum power must be supplied to this machine?

• A)520 W
• B)3.9 kW
• C)6.7 kW
• D)4.3 kW
• E)1.1 kW