1. Carefully sketch x vst. t and v vs. t plots on the axes below for an object w
ID: 2129039 • Letter: 1
Question
1. Carefully sketch x vst. t and v vs. t plots on the axes below for an object which starts with a negative displacement and a positive velocity, then experiences a negative acceleration and eventually comes to a stop.
x vx
2. A football player, starting from rest at the line of scrimmage, accelerates along a straight line for 1.5 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.1 m/s2. With this acceleration, he continues in the same direction for another 1.2s. Finally he slows up, instantly switching his acceleration to 1.7 m/s2 in the opposite of his direction of motion and coming to a stop after another 2 s.
a. What is the value of his acceleration (assumed to be constant) during the initial 1.5s period?
b. (4 pts) What is the the total distance covered from start to stop?
Carefully sketch x vst. t and v vs. t plots on the axes below for an object which starts with a negative displacement and a positive velocity, then experiences a negative acceleration and eventually comes to a stop. A football player, starting from rest at the line of scrimmage, accelerates along a straight line for 1.5 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.1 m/s2. With this acceleration, he continues in the same direction for another 1.2s. Finally he slows up, instantly switching his acceleration to 1.7 m/s2 in the opposite of his direction of motion and coming to a stop after another 2 s. What is the value of his acceleration (assumed to be constant) during the initial 1.5s period? What is the the total distance covered from start to stop?Explanation / Answer
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