Power Engineering 3A1 ch 5 questions with complete solutions graded A+ passed

Power Engineering 3A1 ch 5 questions with complete solutions graded
A+ passed
1. From what height must a mass of 2 kg fall to have e
the same amount of kinetic energy as a bullet of 25
g traveling at the speed of 1000 m/s.
Select one:
A. 50 m
B. 98.1 m
C. 243.7 m
D. 543.39 m
E. 637.1 m

2. The work required to move a mass of 20 kg up a d
vertical distance of 10 m in one minute is:
Select one:
A. 9.81 J
B. 32.7 J
C. 32.7 kJ
D. 1962 J
E. 115.72 kJ

3. A steam turbine has an output of 40 MJ/s. Its power c
output, in kW is:
Select one:
A. 11.11 kW
B. 4,000 KW
C. 40,000 kW
D. 24,000 kW
E. 240,000 kW

4. A train travels at various speeds between several sta-
c tions. From the train schedule the following informa-
tion can be extracted about the different segments of
the journey: 8 km traveled in 10 min., 14 km in 12 min.,
16 km in 18 min., 12 km in 10 min. The average speed
during the whole trip is:
Select one:
A. 13.89 km/h
B. 50.0 km/h
C. 60.0 km/h

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, Power Engineering 3A1 ch 5 questions with complete solutions graded
A+ passed
D. 72.0 km/h
E. 100.0 km/h

5. By definition, the result of a force moving through a c
distance is:
Select one:
A. Power
B. Acceleration
C. Work
D. Moment of force
E. Velocity

6. As the acceleration due to gravity is a known con-

c stant, the final velocity of a falling body may be
found by the formula:
Select one:
A. v = u² + 2as²
B. v = u + v/2
C. v = u + at
D. v = u²+ 2as
E. v = ut + ½at²

7. A word that refers to the change in the position of a b
body, relative to some reference point is:
Select one:
A. Magnitude
B. Displacement
C. Direction
D. Distance
E. Velocity

8. The kinetic energy of a 1000 kg automobile travelling c
at 60 km/h is:
Select one:
A. 16.67 kJ
B. 60 kJ
C. 138.8 kJ
D. 60 000 kJ
E. None of the above
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