Two cars start from rest at a red stop light. when the light turns green, both cars accelerate forward. the blue car accelerates uniformly at a rate of 3.7 m/s2 for 4.4 seconds. it then continues at a constant speed for 8.3 seconds, before applying the brakes such that the carâs speed decreases uniformly coming to rest 216.0 meters from where it started. the yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop. 1. how fast is the blue car going 1.8 seconds after it starts? 2. how fast is the blue car going 10.0 seconds after it starts? 3. how far does the blue car travel before its brakes are applied to slow down? 4. what is the acceleration of the blue car once the brakes are applied? 5. what is the total time the blue car is moving? 6. what is the acceleration of the yellow car?
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What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body
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Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers
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Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.
Answers: 3
Two cars start from rest at a red stop light. when the light turns green, both cars accelerate forwa...
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