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1. |
1000 kW of power is supplied to a motor. 90% of this is transmitted to a machine operating at 80% efficiency. The machine lifts an object of 10-tons with a velocity _____ m/s. (Assume g = 10m/s2) |
A. | 2 |
B. | 4 |
C. | 6 |
D. | 8 |
Answer» D. 8 | |