1. Because of gravity....
2. No you either feel still ( gravity) or is actually in movement....
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Here’s the answer now hand over the brainilyiest
Answer: Average acceleration is -2.407 
Explanation:
Average acceleration is equal to change in velocity divided by time taken
therefore, 
=> 
Average speed =
(total distance covered)
divided by
(total time spent covering the distance)
Increasing the tension of a spring affects a wave on the spring because it increases the frequency. When the tension rises, so does the frequency.