A car traveling along the highway brakes to a stop. A greater braking force is required when the car has
A) more mass.
B) more momentum.
C) less stopping distance.
D) all of the above
E) none of the above
Answer: D
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The Voyager I and II spacecraft visited the Jovian planets in the 1980s. When will they reach the distances of the nearest stars?
A) in our lifetime B) in our children's lifetime C) thousands of years from now D) in our grandchildren's lifetime E) hundreds of thousands of years from now
The last page of a book is numbered 764. The book is 3.0 cm thick, not including its covers. What is the average thickness (in centimeters) of a page in the book, rounded to the proper number of significant figures?
A) 0.0039 cm B) 0.072 cm C) 0.0079 cm D) 0.00393 cm E) 0.00785 cm
A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH. The total momentum of the system is
A. 14.2 kg m/s at an angle of 48.4 degrees SOUTH of EAST. B. 48.2 kg m/s at an angle of 24.2 degrees SOUTH of EAST. C. 48.2 kg m/s at an angle of 48.4 degrees NORTH of EAST. D. 24.1 kg m/s at an angle of 24.2 degrees SOUTH of EAST. E. 24.1 kg m/s at an angles of 48.4 degrees NORTH of EAST.
Which of the following is a similarity between Frederick W. Taylor and Lillian Gilbreth?
a.They both developed time study. b.They both strove to simplify work. c.They both proposed giving workers longer work hours and fewer breaks. d.They both used film cameras to analyze jobs.