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What is the most appropriate SI unit to express the speed of a cyclist in the last leg of a 10-km race? A. km/s B. km/h C. mm/s D. cm/h
Weegy: The answer is B. km/h User: A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to rest against a tree. What is the magnitude of the ball’s displacement? A. 4 meters B. 9 meters C. 14 meters D. 45 meters Weegy: A. 4 meters .The ball only moved 4 mts away from initial position, regardless of the 9 meter travel. User: Suppose ... (More)
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Asked 3/29/2013 9:30:45 AM
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A speed-time graph shows that a car moves at 10 m/s for 10 s. The car’s speed then steadily decreases until it comes to a stop at 30 s. Which of the following describes the slope of the speed-time graph from 10 s to 30 s? A. linear, horizontal B. curved, upward C. linear, sloping downward D. linear, sloping upward
Weegy: C. linear, sloping downward User: What is instantaneous acceleration? A. how fast a speed is changing at a specific instant B. how fast a velocity is changing at a specific instant C. how fast a direction is changing at a specific instant D. all of the above Weegy: B. how fast a velocity is changing at a specific instant User: A river current has a velocity of 5 km/h relative to the shore, and a boat moves in the ... (More)
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Asked 3/29/2013 9:34:02 AM
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Which example identifies a change in motion that produces acceleration? A. a speed skater moving at a constant speed on a straight track B. a ball moving at a constant speed around a circular track C. a particle moving in a vacuum at constant velocity D. a vehicle moving down the street at a steady speed
Weegy: B. a ball moving at a constant speed around a circular track is an example identifies a change in motion that produces acceleration. User: One kilometer equals 1000 meters. What does the prefix kilo- mean? A. 1 B. 10 C. 100 D. 1000 Weegy: D. 1000 User: An orange might roll off your cafeteria tray when you stop suddenly because of A. the balanced forces acting on the orange. B. the centripetal force acting ... (More)
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Asked 3/29/2013 9:39:16 AM
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The gravitational force between two objects increases as mass A. decreases or distance decreases. B. decreases or distance increases. C. increases or distance decreases. D. increases or distance increases.
Weegy: C. increases or distance decreases. User: Newton’s third law of motion describes A. action and reaction forces. B. balanced forces. C. centripetal forces. D. net force. User: Your weight equals your A. mass. B. mass divided by the net force acting on you. C. mass times the acceleration due to gravity. D. mass times your speed. Weegy: Your weight equals your B. mass divided by the net force ... (More)
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Asked 3/29/2013 10:07:19 AM
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