TEST 11. Problem solving. Write all the given variables including the formula used in solving the problem and box your final answer. ( 10 pts.) 1. A train from rest accelerates uniformly over a time of 2.5 seconds and covers a distance of 20 meters. Determine the acceleration of the train.
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Given:
Initial position: 0 m
Final position: 20 m
Time: 2.5 s
Average acceleration: ?
Formula:
acceleration: change in velocity
time
Solving:
change in velocity = 20 m - 0 m
= 20 m
acceleration = 20 m
2.5 s
acceleration = 8 m/s
The train's average acceleration is 8 m/s.
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