V= s/t = 400/4.5=800/9 (km/h)
The rotational speed of the two children is the same.
In fact, it is defined as
where
is the angle covered in the time
. As it can be seen, this quantity does not depend on the distance from the centre, so the rotational speed is 4.0 revolutions per minute for both children.
Answer:
The elastic limit of a material is the furthest
point it can be stretched or deformed while
being able to return to its previous shape.
Explanation:
Once a material has gone past its elastic
limit, its deformation is said to be inelastic.
The higher the spring constant, the stiffer
the spring.
Answer: Acceleration is 0.25m/s^2
Explanation: