Answer: Sprinter's average acceleration = 
Explanation:
The formula for the average acceleration is given as follows:
--- (A)
Where,
= Final velocity = 
= Initial velocity = 
= Elapsed time = 10 seconds
Plug the values in equation (A):
Therefore, the sprinter's average acceleration is .
The Short Answer: Earth’s tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun’s most direct rays. So, when the North Pole tilts toward the Sun, it’s summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it’s winter in the Northern Hemisphere.
Answer:
The straight line
Explanation:
All the other stuff is sound waves
Explanation:
KE is directly proportional to the square of velocity / speed.
if speed is 2 times (doubled) the KE will be
= 4 times the original KE
Answer:
a) 70,560 J
b) 88.2 N/m
Explanation:
The spring potential will equal the change in gravity potential
PS = PE = mgh = 80(9.8)(100 - 10) = 70,560 J
PS = ½kx²
k = 2PS/x² = 2(70560)/(100 - 50 - 10)² = 88.2 N/m
