I think it’s either A or B
Friction is causing the skateboard to stop rolling.
Answer:
l=3.5 x 10^-10m
Explanation:
just toook the test got it right good luck!
Answer:

Explanation:
The time the stone takes to fall can be calculated considering only the vertical component with the formula:

Taking the inital height as 0m and downward direction positive, since it departs from (vertical) rest we have:

Which gives us a time:

Horizontally, on that time the stone travelled a distance x=10m, which means its horizontal speed was:

Since <u>this speed is the tangential velocity</u> while whirling, the centripetal acceleration of the stone was:
