Answer:
the change in speed of the sled after 3.0 s is 60 m/s.
Explanation:
Given;
constant acceleration of the sled, a = 20 m/s²
change in time of motion, dt = 3.0 s
The change in speed of the sled after 3.0 s is calculated as;

Therefore, the change in speed of the sled after 3.0 s is 60 m/s.
C.) Alpha Centauri
Explanation:
Due to it being the closest planetary system to earth.
About 4.367 light years away.
When you are in free fall, the force of gravity is stronger than your velocity perpendicular to where you're falling, and you move at a constant speed downwards.
Under feelings of weightlessness, you are still being pulled by gravity, but your perpendicular velocity and distance from the source can cancel each other out.
Explanation:
see the above attachment to solve the question and get the answer.
hope this helps you.
Answer:
you would die and be dead.....
Explanation: