A 60.0 kg trunk starts at rest on a student's dorm room floor. The student pushes the trunk a distance of 10.0 m along a straight line. The student accomplishes this by exerting on the trunk a constant force of 300 N, directed 20 degrees below the horizontal. The coefficient of kinetic friction between the trunk and the floor is 0.250 . In the following, consider the period of time during which the student pushes the trunk along the 10.0 m distance. For simplicity, assume that g = 9.80 m/2. 300 N

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A 60.0 kg trunk starts at rest on a student's dorm room floor. The student pushes the trunk a distance of 10.0 m along a
straight line. The student accomplishes this by exerting on the trunk a constant force of 300 N, directed 20 degrees below the
horizontal. The coefficient of kinetic friction between the trunk and the floor is 0.250 .
In the following, consider the period of time during which the student pushes the trunk along the 10.0 m distance. For
simplicity, assume that g = 9.80 m/
20°
300 N
Transcribed Image Text:A 60.0 kg trunk starts at rest on a student's dorm room floor. The student pushes the trunk a distance of 10.0 m along a straight line. The student accomplishes this by exerting on the trunk a constant force of 300 N, directed 20 degrees below the horizontal. The coefficient of kinetic friction between the trunk and the floor is 0.250 . In the following, consider the period of time during which the student pushes the trunk along the 10.0 m distance. For simplicity, assume that g = 9.80 m/ 20° 300 N
5. Find the average power delivered by the student.
A. 905 W.
B. 851 W.
C. 521 W.
D. 1.70 kW.
E. 1.37 kW.
6. The change in the trunk's kinetic energy is
A. 1.09 kJ.
B. 2.88 kJ.
C. 4.55 kJ.
D. 3.00 kJ.
E. 1.53 kJ.
7. The final speed of the trunk is
А. 12.3 m/s.
В. 3.89 m/s.
C. 10.0 m/s.
D. 9.69 m/s.
E. 6.03 m/s.
Transcribed Image Text:5. Find the average power delivered by the student. A. 905 W. B. 851 W. C. 521 W. D. 1.70 kW. E. 1.37 kW. 6. The change in the trunk's kinetic energy is A. 1.09 kJ. B. 2.88 kJ. C. 4.55 kJ. D. 3.00 kJ. E. 1.53 kJ. 7. The final speed of the trunk is А. 12.3 m/s. В. 3.89 m/s. C. 10.0 m/s. D. 9.69 m/s. E. 6.03 m/s.
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